Tome of Eldritch Lore



"''"Once upon a midnight dreary, while I pondered, weak and weary, Over many a quaint and curious volume of forgotten lore...""

- Edgar Allan Poe, The Raven

The Artifact of Doom version of the Great Big Book of Everything. An old leatherbound book, with engravings depicting unpleasant creatures, prophecies of certain doom, and spells that do everything from turning toenails green to stopping (or causing) The End of the World as We Know It. And don't ask where they got the leather unless you really want to know (and you don't).

Villains collect these books for their step-by-step guides to bringing about The End of the World as We Know It. When read by the hapless, they tend to summon The Legions of Hell into the mortal realm. When the books are read by the comic relief, Hilarity Ensues.

In Cosmic Horror Stories, they typically drive their readers into gibbering insanity, the title alone can make them hear voices.

Normally these books are centuries old, but one common subversion is for them to be modern paperbacks with almost-familiar names—e.g., The Idiot's Guide to Demonology, A Child's Garden of Gibbering Horrors, The Home Handyman's Guide to Building Gates to Hell, Chicken Soup for the Soulless.

See Magic Hat and Things Man Was Not Meant to Know. Compare Brown Note. Not to be confused with the Great Big Book of Everything or Spell Book, which are more of a neutral nature. May overlap with Tomes of Prophecy and Fate if they have evil prophecies. Can involve The Fourth Wall Will Not Protect You.

Anime and Manga

 * Madlax—The Firstari, the Secondari and the Thirstari are capable of driving cities of men into their darkest emotions, creating doppelgangers, and bringing down airplanes.
 * Common item in the Read or Die TV series done different ways. One, in which a god-like man named "The Gentleman" had his essence written into a number of such books. In the OVA series, there's a partial subversion: handwritten notes in the margins of an otherwise-harmless book held the secret to . The manga used it straight; The Dark Abyss, a book bound in human flesh, that the publisher required 5 different people to print, a page at a time. Reading it or listening to someone read it instantly resulted in insanity.
 * Yu Yu Hakusho has a videotape, Chapter Black, which serves essentially the same purpose. It's a recording of every evil deed ever done by humans, which human-hating Big Bad Sensui makes a point of showing to his followers to drive them insane with disgust at people.
 * Notably, its part of a two-tape set. The other tape, Chapter White, records every good deed ever done by humans, and you're not supposed to watch one without the other. Guess what Sensui did.
 * Soul Eater has the Book of Eibon, written by a sorcerer centuries ago. It contains the information Arachne used
 * Which is a shout-out to the fictional tome (aka the Liber Ivonis) from the Cthulhu Mythos(see below).
 * The book itself is so evil that it's indexed by sins, and it currently contains at least one of the worst creatures imaginable,
 * And later we learn that
 * Grimoires in A Certain Magical Index seem to be this, considering that they allow the user to gain tremendous power, but the results range from (so far) Blood From the Mouth at best and Body Horror at worst. Only the eponymous Index of Prohibited Books has been able to read the grimoires and store them in her head, since she has no mana to power the grimoires.
 * Caster's Noble Phantasm in Fate/Zero is Prelati's Spellbook, a tome with a covering made of human skin. It's a self-powering prana generator and allows the user to summon Eldritch Abominations. It's also called the R'lyeh text, as a Shout-Out to the Cthulhu Mythos. It can also allow Caster to . Is it any wonder that Caster is so absolutely insane?
 * The Poneglyphs in One Piece, possibly. While the World Government claims the information written on these mysterious steles is dangerous (which is technically true, as they do their best to kill anyone suspected of being able to read them) others like Nico Robin and Gold Roger before her believe the information is more benevolent. Not nearly as portable as the standard tome, the Poneglyphs are huge monoliths scattered among the islands across the world, their secrets incomplete until all of them are discovered. (Robin usually copies the writing using a rubbing so she can decipher it later.) They are known to hold information about the Void Century, a time period the World Government seems intent on keeping everyone in the dark about for unknown reasons, along with information on the three Ancient Weapons. It is known that there are thirty of them total; 9 are "Historical Poneglyphs", that hold the coveted information, 27 are "Instructional Poneglyphs", that provide clues to where the Historica Poneglyphs are, and four (which are distinguishable by their red color) called the "Road Poneglyphs" that hold information on the location of Laugh Tale, the island where Gold Roger's legendary treasure is supposedly hidden.
 * Eventually,
 * Played straight with the blueprints sought by both Crocodile and CP9 during the Alabaster and Water 7 arcs, respectively. These schematics were used to build Pluton, one of the three Ancient Weapons built during the aforementioned Void Century. Pluton is a battleship of some sort with enough raw power to sink an entire island in one shot, at least according to Crocodile. While it's current location is unknown, the blueprints were preserved in case someone had to build a weapon to defeat the original Pluton, but someone must have overlooked another possibility - someone might use them to build a fleet of them. Franky eventually eliminates this possibility with the traditional way one deals with a source of cursed knowledge - burning them.

Comic Books

 * Possibly the ultimate form of this trope is Destiny of The Endless's Book. In it is written the entirety of existence, past, present and future. Every person, every bit of knowledge, every event, every possibility. It's a good thing the Book is chained to Destiny and he's the only one who can read it, cause anyone else reading it would either grow omnipotent or have his/her mind irrevocably shattered.
 * In an episode of Badger dealing with Lovecraftian beasties, Mavis whipped out her "Pocket Necronomicon".
 * In the Marvel Universe, a Tome called the Darkhold contains a variety of spells, including the Montessi Formula, which unmakes vampirism (and vampires).
 * Worth mentioning, that using any spell from this tome equals sealing your soul to evil god Chthon, and most of them works in really twisted and sick ways.
 * One of the weird things about it is that in the MU, vampirism started when a group of Atlantean sorcerers slew their enemies, but weren't satisfied with simply winning the fight and killing their foes. They wanted to make them suffer after death, so they used a spell from the Darkhold to raise them as the first vampires. Predictably things after that did not go 'quite' as the sorcerers intended.
 * There is also the Book of the Vishanti which is said to contain every counterspell and defensive magic ever known or will be known, including a spell to free one from the Darkhold's control (odd that it doesn't seem to contain the spell to cure vampirism, which is in the Darkhold). It also contains a lot of useful lore penned by previous holders of the tome and it seems to explicitly add new pages for current owners to add their own information into its pages.
 * Doctor Strange, the Sorcerer Supreme, has an entire library of these.
 * Kurt Busiek's The Wizard's Tale revolves around a Tome of Eldritch Lore which the inept and not particularly evil wizard must locate and cast spells from.
 * The Sinestro Corps has the Book of Parallax, which contains everything every Sinestro Corpsman has ever done or will do in the name of causing fear.
 * Later on we see the Book of the Black, penned in the tainted black tears of the undead Guardian Scar.
 * Knights of the Dinner Table lampshades this while the knights are playing Scream of Kachoolu (the webcomic strips, bound in Tales from the Vault 5): Brian warns everyone to burn all books they find. This is further compounded by the fact that the last campaign ended messily with Bob's character reading a traveler's guide to Boise.
 * In the Star Wars: Dark Empire comics, the resurrected Emperor Palpatine has written two and is working on a third. They were a kind of combination of Necronomicon and Mein Kampf. The Dark Empire series itself is referred to on occasion as "The Dune Sea Scrolls."
 * The two completed volumes of the originally intended several-hundred-volume set, to in turn be titled the Dark Side Compendium, were The Book of Anger and The Weakness of Inferiors. The third almost-completed tome was to be titled The Creation of Monsters. In the audio drama Luke comes across tapes of The Book of Anger and finds them horrifically compelling. Just listening to them makes him feel cold and perceive the world as getting darker. It takes an effort of the Force to wrench himself away, and even then he wants to study them.
 * The Star Wars Expanded Universe also brings us the Sith holocrons: essentially audio/video/Force recordings of a Sith Lord's teachings and accumulated dark wisdom. They're almost always hidden someplace unpleasant, and if you can find one and disarm all the booby traps, you might get lucky enough to learn something. Have fun!

Fan Works

 * In the Harry Potter fic Inter Vivos, Draco's mother gave him a book that contained "a great deal of Dark Arts knowledge—spells, but also rituals, potions, and many other things, willed into the book by its possessors". When asked a question, it would shift into a book about whatever the subject might be - provided you asked it the right questions.
 * In Shadowchasers: Ascension has its own analysis of The Necronomicon which is ironically stored with other dangerous artifacts by the eponymous organization. Their leader confirms to younger members that the name "Abdul Alhazred" is a ruse, and that the information in the book is a collection of of essays, themes, and treatises by several authors on the entities mentioned in the works of Lovecraft and the authors that were inspired by him, along with instructions on how to summon them; an illithid had first collected them and put them into form book around 800 AD. He further describes it "as a tome that goes into detail on the history and practice of Evil. Within its pages are descriptions of vile rituals involving the summoning of demons, torture, and sadism… Sometimes with illustrations, I'm afraid… But it also gives insight into many secrets that can never be lost.". It's obviously a very long book, and reading too much of it (as anyone familiar with Lovecraft knows) can drive a man insane quickly; with no index or table of contents, this will befall anyone trying to find such secrets, unless you know from a third party exactly what page you need. And while the heroes do know what page they need, even looking at it gives them a chill like the proverbial "someone walking on your grave".

Film

 * The Evil Dead featured a book called Necronomicon Ex-Mortis, which, when read, resurrected a bunch of evil Kandarian spirits. By the time of Army of Darkness, it was just called the Necronomicon.
 * In the first movie and the beginning of the second, it was called the Naturyan Demonta.
 * The Mummy had the Book of the Dead, which unleashed the title monster upon the world, as well as its good cousin, which.
 * The plot of the movie The Ninth Gate (based on The Club Dumas, below in Literature) revolves around a book called The Nine Gates of the Kingdom of Shadows. In the movie it was an adaptation of an earlier work supposedly written by the Devil himself and contained clues on how to summon him in person.
 * In Merlin's Shop of Mystical Wonders, Merlin, of all people, gives one of these to a snobby critic, of all people, to try to persuade him that magic is real. As a result, the critic summons a demon, sets fire to a cat, almost crushes himself and eventually manages to provide his wife with the baby she desires by, in a bizarre kind of "reverse incest", turns himself from her husband into her son. Naturally, Merlin thinks this is a jolly delightful jape.
 * The Lifetime (of all things) movie "Devil's Diary" references a book found in a graveyard, planted there by a lightning strike. Anything negative you write in the book will come true.
 * In the Mouth of Madness features the popular horror novelist Sutter Cane, whose last book is So Bad Its Horrible, if inexplicably well received by the public. Still managed to have a movie made, which was almost as well received as the book and made quite an impact on audiences around the world.
 * Italian director Lucio Fulci used two. City of the Living Dead had the Book of Enoch (an actual text used in the Ethiopian Orhtodox Church, though it probably doesn't really open the gates of Hell), and The Beyond has the Book of Eibon, which has first written about by Clark Ashton Smith, and used in Lovecraft's "The Haunter Of The Dark, "Dreams in the Witch-House," and "The Shadow Out of Time."
 * The witches' Spell Book in Hocus Pocus is not only evilly made (bound in human skin, written in blood, etc), and full of horrific incantations, but is actually intelligent and capable of serving its owners' desires.
 * Beetlejuice has the Handbook for the Recently Deceased, which explains important things to know right after you die. It's supposed to be helpful to such people, but sadly, it reads like stereo instructions.
 * Big Tits Zombie also features a version of the Necronomicon, which summons and controls zombies.
 * The Cabin in the Woods kicks off its serious horror elements with the reliable Latin incantation from a spooky old book.
 * The eponymous book in The Babadook. A pop-up book, believe it or not, one which seems to be a bedtime story for kids, the book is not just magic and cursed, but alive, sort of. The monster seems to become more and more sapient the more the book is read, and stronger the more disbelieving adults deny that it's real, tormenting children and parents alike. Tearing the book up only makes it come back with a scarier story, and while burning it prevents that, it doesn't get rid of the monster; the protagonist has to resort to other methods to finally crush it.
 * Grey's Almanac from the Back to The Future movies. Technically an ordinary sports almanac purchased in a conventional book store in the then-future year of 2015, this book truly matches the trope when brought 50 years into the past, as it contains information on the outcome of sports events from 1960 to 2000. Biff Tannen is able to use the knowledge to amass a fortune from gambling, eventually creating a Bad Future where he rules. Much like the typical cursed tome, burning it at the end of the second movie is required to Set Right What Once Went Wrong.
 * It doesn't have a name, but Winifred's book in Hocus Pocus qualifies. Given to her by Satan himself, it is bound in human flesh and cannot be destroyed by any known method (when the protagonist tries to burn it, it doesn't burn). It's also alive, proven by an eyeball set in the cover, which moves around on its own accord. Among the evil spells that Winnie casts from this book is the curse she places on Thackery which turns him into a cat and makes him unable to die, and a spell which raises her ex-lover Billy from the dead  as a zombie; it also contains the recipe for the potion used to keep her and her sisters forever young - at the cost of the lives of children.

Literature
"I could never endure to seclude myself in a golden tower, and spend the long hours staring into a crystal globe, mumbling over incantations written on serpent's skin in the blood of virgins, poring over musty volumes in forgotten languages."
 * H.P. Lovecraft's Necronomicon is the Trope Codifier. In addition to its cameos and parodies in all sorts of movies, books and TV shows, almost all modern instances of the trope owe something to it. The name is so ingrained in Western culture that many people think the book is real. To a degree this is helped by several companies printing versions of the Necronomicon (The "My first Necronomicon", a guide to the Cthulhu mythos for children, is done in soft felt.)
 * Also note that the myth that there is a "real" Necronomicon was helped by numerous pranks carried out back when there were library card catalogs, rather than electronic databases. Specifically, some smartass would create a fake card for the Necronomicon which was always checked out to one "A. Alhazred" (Abdul Alhazred being the fictional author of the book). In addition, during the 1980s, several instructional guides on how to tell if your kid is involved in Satanism suggested asking if they had ever read the Necronomicon.
 * The Necronomicon is also a common Shout-Out in other works (see Evil Dead):
 * It's mentioned briefly in Wayfarer. It is said that memorizing verses from it and intense training allows an occult student to pierce the veil which angels and demons hide from humanity.
 * The Necronomicon is mentioned in the Global Level section of Unknown Armies as a possible source of overwhelming magical power.
 * Several books called the The Necronomicon have been published, including:
 * A collection of short stories about the fictional Necronomicon by H.P. Lovecraft and other writers.
 * A collection of artworks by H. R. Giger.
 * At least two books purporting to be the "real" Necronomicon, which contains a hodgepodge of Sumerian mythology, Hermetic lore, Kabbalah and other mystical writings. In no way do these stories relate to Lovecraft's works, however.
 * One written by Donald Tyson that details the 'wanderings of Alhazred', and so would be closer to Lovecraft's original idea.
 * At least one collection of Lovecraft's writings.
 * The Necronomicon is not the only book of dark lore that appears in Lovecraft's mythos. Some of the others include De Vermis Mysteriis, Liber Ivonis (The Book of Eibon), Cultes des Goules and Die Unsprechliche Kulten (which Lovecraft thought was German for "unspeakable cults", but actually closer to "unpronounceable". Given the names of the Great Old Ones, it's probably more appropriate that way.)
 * De Vermis Mysteriis has an important role in Stephen King's short story Jerusalem's Lot, a homage to Lovecraft. Necronomicon briefly appears in another short story, I Know What You Need.
 * Terry Pratchett's Discworld:
 * Parodying the Necronomicon, is the Necrotelecomnicon (translated as "On communing with the deceased", or "the Phonebook of the Dead"). Supposedly, reading it would drive a man insane, which suits the purposes of the Librarian just fine (he's an orangutan, and thus not a "man").
 * The books (Equal Rites in particular) even recount an unfortunate case of a mage who tried to read the Necrotelecomnicon, and as a result he was never seen again, and the book became several pages thicker... (On Discworld, Necrotelecomnicon reads you!)
 * The Necrotelicomnicon also appears in the Library of Dream in Neil Gaiman's The Sandman, under its alternate title, the Liber Paginarum Fulvarum (which is Dog Latin for "The Book of the Yellow Pages"). It also makes an appearance in Good Omens (which Terry and Neil wrote together).
 * The Octavo - the book containing the eight most powerful spells, left behind on the Disc by its creator. (When Rincewind "accidentally" read the book, one of the spells got stuck in his head; this left him unable to learn any other spells [even after he got rid of it] - and was responsible for much of the plot of the first two books.)
 * And then there's the footnote about how, like Oxford's Bodleian Library, Unseen University's Library has the books chained to the shelves. The difference is that in the Bodleian that's to stop the students damaging the books, while at UU it's...the other way around.
 * UU also has several volumes of sex magic, one of which must be kept in a room full of ice. Humans can't read them without being driven a very specific type of mad, but the librarian can, because he's an Orangutan, and simply gets unusual feelings about fruit for a while.
 * The Bonfire of the Witches, written on behalf of the Cunning Man, is so full of his hatred of witches that a copy of it allows a curse ineptly attempted against a witch to work simply by being in its proximity, and later almost allows said creature to manifest into the world through its pages before it's pressed shut very decisively.
 * Robert W. Chambers' The King in Yellow stories feature the eponymous play which simultaneously enlightens and drives mad anyone who reads it all. (Presumably a production would be impossible to stage.) Only a few brief excerpts, not enough to clearly indicate the plot or subject matter, are ever given. Likewise, the Yellow Sign is never actually described. Chambers' stories predated Lovecraft's Cthulhu Mythos stories and Lovecraft cited them as an inspiration.
 * A similar work in the Cthulhu Mythos, the Massa di Requiem par Shuggay. is an "opera" that is impossible to perform. Why?
 * The Dictionary of the Khazars, as described in the lexicon novel of the same name, was printed in a poisonous ink. Remarkably, this ink causes convulsions, pain, and eventual death not from licking or eating the pages, but from reading them, and death would always strike at a particular point on the ninth page.
 * One might argue that the Book of the Dead in the Undead and ______ books by Mary Janice Davidson is a Tome of Eldritch Lore, as it can only be read for a page or two at a time before it starts to mess with your head. Though given that it gives instructions and prophecies for Queen Betsy's entire reign (whether or not it has more unpleasant spells and such isn't mentioned), it is also a Great Big Book of Everything as well.
 * The vampire novel, The Historian has one of these which has the effect of attracting Vlad Dracula and his minions to those who find a copy. This is made creeper by the fact that the novel actually looks like the Tome of Eldritch Lore described within.
 * The book The Club Dumas by Arturo Pérez-Reverté reproduces the nine illustrations that provide the clues to invoke the devil in the tome of eldritch lore (De Umbrarum Regni Novem Portis—everything occult sounds better in Latin), repeated each time the protagonist finds one of the three surviving copies of the Novem Portis, as each one has a subtly different set of illustrations. There is a Twist Ending that hinges on these differences. It is little surprising that these illustrations are supposedly reprinted from the fabled Delomelanicon, or Invocation of Darkness.
 * The Malus Codicium, from the Warhammer 40,000: Eisenhorn series of novels, is such a book, as it contains many scriptures on daemon summoning, binding etc. The protagonist (an Inquisitor perfectly used to dealing with such artifacts) finds this book particularly creepy, as unlike lesser books encountered, it gives off no sinister aura. It's just like any other book...that helps you bind daemons.
 * The Necroteuch from the first book is a lesser example, it is the entire focus of the book but what exactly it does is never stated, and it emits an aura of incredible evil so it is a bit of a no-brainer what to do with it.
 * Played for comedy in Bruce Sterling's Schismatrix with "the literature of the [untranslatable]".
 * In the Whateley Universe, one of the main characters, Sara Waite, is a young Eldritch Abomination. She owns shelves full of these, and considers them ideal casual reading material. As long as she can remind them not to eat her friends.
 * The Whateley library also has a restricted section of these. And a REALLY restricted section of the worse ones. Note, however, that Sara's are the ones that the library doesn't dare touch.
 * And then there's horror novelist Michael Waite's best-seller Incongruity, which is really The First Book Of Kellith. The relationship between Michael Waite and Sara Waite is... complicated.
 * F. Paul Wilson's Repairman Jack series has the Compendium of Srem, which translates itself into your native language for your cans-of-evil-unsealing convenience.
 * In Stephen King's The Eyes of the Dragon the wizard Flagg has such a book.
 * The Old Kingdom Trilogy features The Book of the Dead, a green leather-bound book that's different each time it's read and shows a certain disconcerting independence of movement (ie, it knows where it needs to go and will follow along with someone headed in that direction, with or without their cooperation). It can only be opened by a necromancer, and closed by an uncorrupted Charter mage - that is, the Abhorsen and their successor. Normal people find it exudes an aura of deathly chill and utter terror. It's not actively malevolent, though, since it's kind enough to ensure the reader doesn't remember the more horrifying sections until they really really need to.
 * In the second book of the trilogy, Lirael takes on a job working in the Great Library of the Clayr, which is a bit more like a museum. The books (and "exhibits") range from the prosaic to works of great magic, which are kept under lock and key. This has the unfortunate side-effect that if one of said exhibits gets loose somehow, the person responsible has to find a sneaky way of getting at highly protected books if she wants to have any chance at all of stuffing it back into its can.
 * In the young adult horror anthology Still More Scary Stories For Sleepovers, the short story "Night of the Ki-Khwan" has an example. The protagonist's scholar mother brings home a collection of texts that describe Native American rituals. One of these rituals provides instructions on summoning the titular Ki-Khwan, who are essentially Native American werewolves. The protagonist and his friends, being young and foolish boys, decide to give some of the rituals a shot late at night in the woods for a thrill. To their horror, they succeed in summoning the man-beasts. Just when it seems like they can keep their campfire going long enough to keep the creatures at bay,.
 * In the guide book How To Be A Villain, its guide to weapons contains books of evil, which more or less fit this trope perfectly.
 * John Barnes's One for the Morning Glory features Highly Unpleasant Things It Is Sometimes Necessary To Know and worse, Things That Are Not Good To Know At All.
 * Du Svardenvyrd (The Weird of the Swords) in Tad Williams' Memory, Sorrow and Thorn trilogy is a perfectly straight example of this trope. Written by a mad prophet, it causes mortals who read it to Go Mad from the Revelation, and it is eventually revealed that the book is basically an instruction manual for summoning the undead Storm King back into the world. Notable in that the book doesn't have any inherent mystical power, but the secrets it reveals are too much for a sane mind to accept.
 * The Book Bound in Pale Leather in P.C. Hodgell's Chronicles of the Kencyrath books works a lot like this, even though it was given to the Kencyr people by their God. It's not exactly nice, and neither is the book; reading too much of it can drive you mad or kill you, and the Master Runes inside are highly dangerous to use. Oh, and that leather? Human skin, and the Book appears to be alive; dropping it gives it bruises.
 * This raises an obvious question: how can dried, tanned hide get bruises?!
 * No one said it's dried or tanned...
 * The Shannara Series by Terry Brooks has The Ildatch, an Artifact of Doom dating back to the war between the good Fae and the Demons. Filled with dark magics, it corrupted the rebel Druid Brona into becoming The Warlock Lord, transformed his followers into the Skull Bearers, and later transforms a new group of people into the Mord Wraiths. Destroying it serves as the main plot in The Wishsong of Shannara..
 * In Ben Counter's Warhammer 40,000 Horus Heresy novel Galaxy In Flames, Loken runs across a book that changes languages (and alphabets) under his gaze, gives him horrific visions, and convinces him that the Outgrown Such Silly Superstitions view of the Empire is wrong.
 * Caster's book in Fate/Zero is a tome that has an essentially limitless magical supply and summons demons/eldritch abominations for him. They're actually really weak but they can be regenerated faster than they can be killed if there are a decent amount of them fighting. And he was summoned by a book bound in human skin involving a ritual involving Blood Magic. Technically, you're supposed to use chickens so its not that bad, but it was also found by a Serial Killer who finds killing an art.
 * In The Cassini Division (A Fall Revolution book by Ken MacLeod) two characters peruse a market stall selling old books. One tome, Home Workshop Nanotech by a "Dr. Frank N Stein" published some 250 years before the events of the book explained in straightforward terms how to make replicating nanotech using a simple computer, some household chemicals and a tunnelling electron microscope. Sci-fi to be sure; but a mysterious ancient book containing world-shattering knowledge of things man was not meant to meddle with? Sounds pretty eldritch to me.
 * In The Golden Dream of Carlo Chuchio the hero buys a mysterious book in a market and finds that it contains not only tales of old but a treasure map. The description implies that the book is a Shout-Out to the Arabian Nights.
 * In The Dresden Files book Dead Beat, The Word Of Kemmler is a book written by the necromancer Kemmler, a major Big Bad who was responsible for a whole mess of atrocities and other badness throughout history, up to and including World War I. Yes, all of it.
 * Dead Beat also features Der Lied der Erlking, a collection of poetry, art, and prose dedicated to the Erlking, head of The Wild Hunt. Amongst all that poetry is a summoning rite meant to bring the Erlking and the Hunt into the world.
 * Otherwise subverted, though; the White Council actually encourages the spread of books of dark rituals, since they only have a limited amount of power to go around and mass-publications tend to dilute them into uselessness.
 * Except in some cases, as Thomas tells us, that perfectly sensible strategy backfires when just the knowledge that the rituals exist, and therefore so does the thing they're meant to summon, is enough to keep the thing in question on this plane of existence.
 * The dark Book (The Book Which is Not Named) in Diane Duane's Young Wizard's series.
 * Arguably the bright Book (Naming of Lights or The Book of Night with Moon) has the same potential... reading from either book is not something you do lightly.
 * The short story El Libro de Arena ("The Book of Sand), by Jorge Luis Borges, contains a version of one of these. The bibliophile protagonist trades a priceless 14th-century Bible for a mysterious book in an unknown language that has no beginning, no end, pages that are out of order, and never allows the reader to see the same page twice (it is implied that the number of pages is infinite). Over time, he loses what few friends he actually had, and spends his every waking minute fanatically obsessing over a book he cannot read, copying pages and illustrations before they vanish forever. Unlike most such stories, this one appears to end relatively well- the protagonist recognizes the evil of the book, and disposes of it in a place where neither he nor anyone else will likely ever find it by tucking it into a random, dusty shelf among the National Library's 900,000 books (he first considered burning it, but feared that the burning of an infinite book might be infinite itself and cover the world with smoke). It seems to be implied that he was better off with his good old-fashioned Bibles, but opinions may differ on this last point.
 * The Grimmerie from the novel of Wicked is implied to be one of these, but no Ozian can actually read the thing. . It's also revealed that the is a mere Evil Plan to get his hands on it!
 * Harry Potter has passing references to these, but they are apparently so common in the wizarding world that the only precautions taken with them is putting them in the restricted section of the school library, rather than the main section. Even though an example of one of these books screams when it is opened for some unfathomable reason...
 * And there are more horrific versions of this trope in the Potter Verse. The Monster Book of Monsters actually tries to bite its readers. There's the ones Ron warns Harry about: ones that burn people's eyes out, ones that make them speak in limericks for the rest of their lives, or ones that the reader can never, ever stop reading. There's also homemade ones, like the graffitied copy of Advanced Potion-Making. However, those are paltry compared to Tom Riddle's diary.
 * G. K. Chesterton subverted this trope in The Blast From The Book.
 * Thoroughly deconstructed and parodied in R.A. Wilson's The Masks of Illuminati, where a number of people are apparently mailed copies of a book that after only slightest glance sends them to suicidal mania, after first thoroughly destroying the volume.
 * In Robert E. Howard's Conan the Barbarian story A Witch Shall Be Born the title witch did not mind when the magician who raised her drove her off.


 * This is a common Conan the Barbarian trope.
 * In Valentin Ivashchenko's Dancing Flame:
 * The unnamed tome on necromancy, written by the last grand necromancer Yaromor. The book contains pure Black Magic knowledge and a large fraction of Yaromor's power, granting both to the current user. The power also actively searches for new users every few centuries, although Heroic Resolve allows to contain the power without being corrupted. Killing the user grants the world said few centuries of peace, thus forcing a later generation to deal with the next grand necromancer.
 * Earl Valle's spellbook. Valle is the most powerful and most studious necromancer to ever live - his spellbook contains a few things generally thought impossible for necromancers by the setting's Mutually Exclusive Magic. Valle himself was disgusted by the book's contents, so he just destroyed it.
 * In Vitalij Zykov's Return series, this trope takes the form of stone tablets rarely found at relic sites of ancient civilizations. The tablets are covered with text in a language older than any humanoid race, including two elven races. It's only known that the tablets contain magic-related information. The protagonist happens to learn said language by Exposition Beam, learns one of the spells and casts it in a magical duel. The resulting damage is considered overkill in comparison to magical carpet bombing by dragon squadrons.
 * The Codex in The Secrets of the Immortal Nicholas Flamel series.
 * Coriakin's Great Big Book of Everything in The Chronicles of Narnia.
 * In Strong Spirits, the protagonist's rival in mediumship, Cockcroft, has acquired a famous necromancer's Tome of Eldritch Lore and wants to summon the author's ghost to help him figure out its cryptic contents.
 * The Darke Index in Septimus Heap.
 * The grimoire of King Gorice of Witchland in E. R. Eddison's The Worm Ouroboros, used to harness the powers of Hell.
 * Mister B. Gone. The Villain Protagonist is trying to convince you that the actual book - the one you are reading - is cursed, and wants you to burn it before falling victim to it, and he is very convincing. (But hey, what would you expect from a novel by Clive Barker?).

Live-Action TV

 * In Charmed, there is the Grimoire, which is the demon equivalent of the Book of Shadows.
 * On Buffy the Vampire Slayer, Giles had whole bookcases filled with these. "Xander, don't speak Latin in front of the books."
 * He used to keep them in the library of the high school. This was lampshaded once, with the principal doing a search of the library and questioning whether it was appropriate to have in a high school library filled with tomes instructing on the uses of dark magic - despite being asked during a period of demonic-inspired moral panic against magic, this was actually quite a reasonable question, considering.
 * Notice that Snyder confiscated the books, but in succeeding episodes Giles has them again. Apparently, Snyder returned these books to Giles afterwards, no matter how out of character that might seem.
 * Or maybe some of Giles' friends and associates...persuaded...Snyder to give them back. Or maybe he made him forget the whole thing, and took them back himself. This IS the guy who.
 * Giles explained in an early episode that he did it because the students never come into the library. It's the perfect place for a Watcher to put a collection of books so no-one will ever read them.
 * Remember that in a previous episode Giles physically threatened Snyder so he would reinstate Buffy. Besides, the books were probably kept by the anti-supernatural mob and would probably return it to him since it was his "personal collection".
 * And then at the end of season 6, absorbs all the knowledge from these books and actually does
 * Zigzagged with The Vampyr, or Slayer’s Handbook, which is of the "dangerous only in the wrong hands" type of Tome. This tome was traditionally given to Slayers by their Watchers to instruct them on how to operate as the Slayer; the book contained the history and rules concerning magic and the supernatural world. (Giles had given it to Buffy, but she rarely used it initially, being a rebel who rarely followed rules.) However, in Season 9, after the world was purged of magic and then a new Seed of Wonder restored it, the true power of the book was unlocked. It went blank, and then started rewriting itself, adjusting to fit the modern world. In some cases, this was a good thing, as it got rid of archaic unnecessary laws (like the need to cast spells using dead languages) and abolished the “only one Slayer at a time” rule, giving Buffy some much needed help. But it also adjusted many rules to fit modern perception of magic, giving vampires powers that mostly only existed in movies; newly-sired vampires would be able to shapeshift, survive the sun, and hypnotize mortals. The true danger, however, was that anything written in the book would become fact and apply to the laws of magic. Some beings who used this did so for harmless purposes, like Clem doing so to make unicorns real to make Harmony happy. However it came as no surprise that some used it for less than noble purposes. Andrew tried to use it to bring Tara back to life (he failed - Willow stopped him) while Dracula forced Xander into using it to transform Dracula into the form of the Old God Maloker; Dracula regretted this decision when the spirit of the true Maloker took control of him - he ended up begging Buffy to slay him.
 * Despite this, Buffy and the Scoobies still used the dangerous effect for benevolent purposes many times, such as to negotiate with Harmony (As in, “We’ll let you keep the sunlight immunity if you stop attacking humans.”) She also used this to aid their (reluctant) allies in the Magic Council; for instance, when three powerful demons (the Mistress, Soul Glutton, and the Sculptor) planned to open another Hellmouth; Buffy simply rewrote the tome to give the Council members powers they needed to find, confront, and kill the would-be invaders.
 * The Book of Changes from Ghost Whisperer.
 * The finale of Deep Space Nine, of all series, featured one of these. The fact that its pages remained blank until splattered with the blood of a murdered man really should have been a hint that the ritual it was going to be used for was not a good idea.
 * The Grimoire in Blood Ties is used several times to summon demons. Henry has his own copy, "confiscated" from a bunch of Medieval cultists, and uses it to sabotage summoning rituals.
 * In Mighty Morphin Power Rangers Finster uses a spellbook/cookbook to create monsters; it has lots of full-color full-page illustrations of the various Monsters of the Week.
 * The Book of Predictions from Doctor Who, the book that inspired Davros to create the Daleks. Written in the language of an extinct race called the Dals, the book contains various religious texts and prophecies, one of which saying "...and on that day, men will become as gods." Devos interpreted the word for "gods" as "Daleks". While it is unlikely the Dals intended this book to spawn one of the most destructive and evil of species, that was the result.
 * The Darkhold has made appearances in various TV series associated with the Marvel Cinematic Universe, including The Runaways, Agents of S.H.I.E.L.D. and WandaVision.

Tabletop Games

 * Dungeons & Dragons has had countless numbers of these over the years and editions. If one is of a magical turn of thought, caution should be taken when putting pen to paper. The most notable and persistent of these tomes is the Book of Vile Darkness, which is so evil that reading it can damage a good person's mind. (The publishers of the game actually produced a sourcebook on evil by this name later on.) The original edition of D&D actually had separate versions of this text for priests and wizards, with the Book of Vile Darkness being the priestly version and the Libram of Ineffable Damnation the wizardly version. A few subversions also exist: the Book of Exalted Deeds, a book of pure goodness (and the Libram of Silver Magic, its wizardly cousin), and the Libram of Gainful Conjuration, which can only be read if you don't side with either good or evil.
 * All of which are mere cheap knockoffs of the REAL badass book of AD&D, The Codex of the Infinite Planes. How bad is it? For starters, it's the size of a small room. Just opening it can reduce you to a small pile of ashes. If you aren't killed, you can use the book to achieve near-perfect power over reality... but if you ever stooge one of the spells within, they'll never find your corpse (assuming you leave one).
 * The Tome of the Stilled Tongue, sacred to Vecna, deserves its own mention. This is the kind of book which a) can only be safely used by those worshipping an evil lich-god of scheming and dark magic and b) comes with a free human tongue nailed to the front as an example of why you shouldn't blab the secrets of the Maimed God.
 * A few non-magical tomes of lore have achieved prominence in D&D, including the Black Scrolls of Ahm and the notorious Demonomicon of Iggwilv.
 * Another is the Codex of Betrayal, which is a collection of four books, each with several dozen chapters, totaling multiple thousands of pages, written by the last follower of the God that was murdered and over thrown by Asmodeus. It chronicles the history of the god, the war in heaven, and the creation of devils, serving a similar function for devils as the Demonomicon of Iggwilv serves for their Chaotic Evil adversaries.
 * The Book of Keeping is not a cursed or magical book, but still a dangerous one. This book contains information on summoning powerful yugoloths, even giving the true names of a few of them. No-one knows who wrote it — given that he would likely be the yugoloths' most hated enemy, he may no longer be alive. At least four copies of the Book exist, although some say as many as seven, and their owners tend to change frequently.
 * The Cyrinishad is a cursed unholy tome that Cyric forced a wizard named Rinda the Scribe to create (and incidentally, he forced 397 other wizards to do so previously; Rinda's version was the only one to meet his standards) to be used like a divine trap. Once you start reading this book, you can't stop, and you become convinced that Cyric is the only true god and the only being who deserves worship. Cyric made the dire mistake of reading it himself, his already oversized ego turning to true madness. Naturally, this plan failed, although not before Mask (the god of thieves) was tricked into reading it, Cyric stealing most of Mask's power as a result.
 * Exalted has numerous examples, but the most infamous might be The Broken Winged Crane. How bad is it? It isn't even written yet; all the copies that exist are reverse engineered from the perfect version that comes into existence the day the world ends. And seeing as the only canon character to have read the book is implied to have been abducted and mind raped by archdemons, there's a very good chance the book causes it.
 * As befits its tone, Deadlands has a few of these tucked away in its pages and pages of Splatbooks. The most "Eldritch Lore-y", though, would be the Whateley Family Bible, which—in addition to having the Family Tr...Shrub (don't ask) in the front pages—contains margin notes on how to perform all manner of dark arts. The irony of profaning a Holy Bible is not lost on the misanthropic family. Player Character Whateleys, while assumed to be a moral cut above their NPC brethren (and cousins and uncles, some of which are the same people), can get a "pocket sized" version, which contains less forbidden lore and can cause panic in anyone attempting to translate it...whether they succeed or not!
 * Mage: The Awakening has numerous books called grimoires, where a mage enscribes all their knowledge of a spell (literally; it leaves their mind forever) so that others can learn it more easily. Needless to say, some grimoires are less than wholesome, including: the book of the life of an Atlantean prophet that turns those who study it enough into a psychic clone of said prophet; a bestiary on Abyssal beings that leads the mage who reads it enough to believe that he's uncovered an important secret and that all his friends have turned on him; and the book that contains both normal spells and spells that draw upon the Abyss but doesn't tell you which are which.
 * The worst of these are The Final Spell Of Ali Ben-Mechem and The Invsible Codex. The former is a seemingly-sentient spell that teaches you how to summon reversed forms of Goetia symbolizing reversed Virtues into your enemies' minds, which are actually Abyssal entities who will escape. The latter is an Abyssal creature in the form of a Tome of Eldritch Lore, which actually takes that form to lure power-hungry mages so it can eat their souls.
 * Interesting subversion: The Ialdabaoth Codex, besides being incredibly hard to spell, seems like it it first, being an Abyssal bestiary that gradually drives it's readers to paranoia and the summoning of it's contents...except that's the precise opposite of the book's intended function: It's actually a prison for the various Eldritch Abominations it describes (it scours the mind of it's new prisoners and writes an entry based on it's findings), and the madness is the result of them trying to get out. The writers of the book were actually pretty nice people, and a story hook presented involves reconstructing their Legacy.
 * While most of them don't literally involve books (and conversely not all book-related cards in the game suffer from this, either), Magic: The Gathering features its share of cards that play on the 'forbidden knowledge' theme by providing access to additional cards for a modest sacrifice in life points or cards already in hand or in play.
 * With the release of the Innistrad set, based on gothic horror, it has an archetypal example: Grimoire of the Dead, whose playtest name was, in fact, "Necronomicon".
 * Warhammer 40,000 brings us first the Book Of Lorgar, which helped start the Horus Heresy, then in true 40k fashion, goes overboard with the Black Library: an entire extradimensional stronghold full of forbidden lore, guarded by space elf ninja clowns.
 * Who worship a god that managed to trick other gods into eating each other. Named the Laughing God of course.
 * Pyramid had an article detailing Clay Bricks of Eldritch Lore which fit pretty much every aspect of this trope (unreadable, evil, drive you crazy) except that they're not actually books (being from before bound books were invented, or from cultures that never did).
 * The Call of Cthulhu (tabletop game) RPG has the typical Lovecraft library from the original stories, and a few additions of its own.
 * And by a few additions we mean an entire sourcebook filled with half to two page descriptions of books both taken from other Mythos sources and invented outright. The major works generally include an Apocalyptic Log hinting at what has happened to characters who came into contact with the book, a history of the book and the explicit effects both skimming and reading it have. Guess what the sourcebook is called...
 * Cthulhu Tech has a Tome of Eldritch Lore that was used to develop the setting's Magitek, but all the scientists that worked on the project were driven stark raving mad.
 * Werewolf: The Apocalypse has the Chronicle of the Black Labyrinth which was written by an insane Black Spiral Dancer Kinfolk describing the lore of the Wyrm. Reading it slowly corrupts the reader to the power of the Wyrm.
 * An expansion book, Warriors of the Apocalypse, includes a Bane character named Tsannik. His human host summoned him using an ill-gotten book of sorcery.
 * Appropriately, the Necronomicon features as a usable (by Professors only) item in the Munchkin expansion "Munchkin Cthulhu." As do Necronomicon parodies like the Necrocomicon, the Necronookiecon and the Necrotelecom.
 * Warhammer Fantasy had the Nine Books Of Nagash the Necromancer. The originals were destroyed but there are some copies still lying around.
 * Games Workshop also released a book called Liber Chaotica (the Book of Chaos), a guide to all things Chaotic in the the Warhammer world, with occasional referances to Warhammer 40k. As a different take on this trope, the writer was not trying to support Chaos, but was ordered by the Cult of Sigmar to compile it to help fight Chaos. Naturally the study of such subjects has a less than stellar effect on his mental health.
 * Arkham Horror, being Cthulhu Mythos The Board Game, features the usual library of eldritch tomes such as Unaussprechlichen Kulten or The King in Yellow. You generally burn movement points to read the tome, make a Lore check, and gain spells, skills, or some other benefit at the cost of sanity.
 * In Earthdawn any book about the Horrors can potentially have bad effects on the person who reads it (including the Horrors source book, but probably the straightest example of a Tome of Eldritch Lore is the Book of Scales. According to legend, a group of powerful Horrors captured a dragon and forced it to write a history of the Horrors, using the dragon's own scales as pages and its own blood as ink. The dragon then scattered the scales as far apart as possible to minimize the damage. The Book of Scales allegedly contains valuable information that can be used to battle the Horror, but is so tainted that carrying around a single scale (not even reading it, mind you, just carrying it) will eventually drive a person mad.
 * A flavor text in the Nobilis Third Edition rulebook says that A Philosophy of Treason, a book detailing the case for serving the Excrucians, has many fake copies that will remove the eyes of any who read and fill their eye sockets with worms. Ouch.
 * Oh, and the genuine article is almost as bad.

Video Games
""Legend has it that the mad Arab Al Aksandir Garambel wrote it after he was driven insane by his very first summoning, a terrifying entity known only as Wa'tz'ynn.""
 * The Mysterium Xarxes in The Elder Scrolls.
 * The script notes actually call for Martin, the most knowledgable major character on the subject, to react as if given "a handful of glowing plutonium" when he receives the Xarxes. It's just that sort of book.
 * In addition to the Xarxes, there is also the Oghma Infinium (infinite wisdom) which is bound in skin and is owned by Hermaeus Mora, the daedric prince of fate and forbidden knowledge. Also the Tome of Unlife which creates liches and the book used in Skyrim to learn the master destruction spells may qualify.
 * The Mysterium Xarxes and Oghma Infinium may be quite eldritch, but if you really want to read something you really shouldn't, try one of the titular Elder Scrolls. The Elder Scrolls are completely irrefutable recordings of history/alternate history; what did happen, what could have happened, what might happen. Even the falsehoods in them are true. Especially the falsehoods. Reading them completely untrained will yield just some weird chart that looks like it has constellations on it, with odd glyphs printed over (or under?) the chart. An incompletely trained reader (knows just enough to hurt themselves) will end up getting something out of it but likely useless, and their eyesight is gone. A well-trained reader can glean much and eventually regain their eyesight... for a finite number of times before their sight is gone for good. The power of the Elder Scrolls is so great, their truths so irrefutable, that not even the machinations of a daedric prince can overcome them; that's how in The Elder Scrolls IV: Oblivion. In The Elder Scrolls V: Skyrim,
 * Fallout 3 has the Krivbeknih and some other unnamed tome, part of a Shout-Out side quest in both the Point Lookout expansion and the original game, respectively.
 * Eternal Darkness centers around one such tome, called The Tome of Eternal Darkness. Crafted from human skin and bones, it does pretty much all the things mentioned above - summons the hordes of hell, allows the use of Functional Magic by employing Instant Runes - all of which you'll need to figure out how to prevent The End of the World as We Know It. And maybe, just maybe, get away with your sanity intact...
 * A couple of optional quests in Fable 2 have the Normanomicon, the book of the extremely dead. Said quest is a touch underwhelming, as it mostly involves getting the book back from a bunch of undead mooks two bumbling brothers (Max and Sam) have accidentally summoned.
 * The book returns in Fable 3 with a more interesting quest line, which involves getting the book for the ghosts of the two brothers from the last game, and one of them going mad with power.
 * The Gran Grimoire in Final Fantasy's Ivalice Alliance miniseries. In Final Fantasy Tactics Advance, it's a magickal tome that transforms the sleepy town of St. Ivalice into the actual Ivalice. In Vagrant Story, it's not a book per se—every stone in the city of Leá Monde is inscribed with ancient Kildean runes, turning the city into the ultimate codex of magick.
 * Golden Sun has the "Tomegathericon" an item which allows the party member who equips it to take the "Dark Mage" classes, and grants powers such as attacking with hellfire, summoning demons and raising zombies. Curiously, the tome is given to the party by a benevolent animistic deity, who asks that they safeguard it until the witch doctor of the tribe that worships the deity has matured enough to be worthy of receiving it (witch doctor also being a benevolent role).
 * Note that it was actually called Necronomicon in Japanese.
 * The various magical tomes from Grim Grimoire. With every new Groundhog Day Loop cycle Lillet goes through, they become even more powerful, until she's capable of summoning dragons, golems, and arch-demons.
 * Shadow Hearts has the Emigre Manuscript, a book so evil that it even has skull-shaped pages. Its main selling point is that it contains instructions on how to bring someone Back from the Dead, something attempted in all four games of the series. Unfortunately, most attempts end up as grotesque Eldritch Abominations.
 * The Pulse Tract and R'lyeh Text count even more so. The Pulse Tract incarnates a god form the soul of the earth, one which very nearly destroyed all of Shanghai and subjected the our hero to The Mother of All Mind Rapes. The R'lyeh Text however, besides being named after a certain undead city, 'summons a god form beyond the stars' which was described as being as far above humanity as humanity is above insects. Eldritch indeed.
 * Super Paper Mario has the Dark Prognosticus, which was featured in the header picture. The game's intro states that "The book held frightful secrets not meant for people's eyes." The first page has a disclaimer warning a prospective user that "anyone who has possessed the book has never found happiness." Later in the game, it's discovered that upon first opening the book.
 * There's a reason nobody was supposed to look at it: opening the book sets in motion The End Of The Multiverse As We Know It, and makes you continue flipping pages until all worlds end.
 * Another book, the Light Prognosticus, was written later. Unlike its darker cousin, this one predicts Mario & Co. stopping the end of everything. Which totally doesn't make the game's "prophecies are meaningless" aesop broken.
 * It's worth noting that the Light Prognosticus is not actually prophetic, but instead outlines a series of steps that its author believed necessary to stop the Dark Prognosticus's prophecies from coming to pass.
 * Alice Margatroid of the Touhou series always carries a locked grimoire with her, and has only opened it once (as the boss of the Extra Stage in Mystic Square).
 * Since then she's always been a stage 3 boss or so. Shows how much power is concealed within that little book of hers.
 * Marisa Kirisame wrote one herself, The Grimoire of Marisa. The actual publication is an odd piece of merch: it's not really detailed enough to be a Strategy Guide, and too narrow in focus to be a Universe Compendium (a function already performed by Perfect Memento in Strict Sense). Perhaps ZUN wants to emphasize that Touhou is supposed to be about its gameplay?
 * Books of dark magic and eldritch lore appear in Warcraft games. Notable ones include the Book of Medivh, which was used to summon the demon lord Archimonde, the Compendium of Shadows, and Lexicanum Demonica, which is said to contain the name of every demon in existance.
 * The Book of Condemnation in Suikoden V and Alhazred, the recruitable character who is looking for it.
 * In Shadow of the Comet, the player gets to read a few pages of the Necronomicon, although he's been warned that it would drive him crazy. (he can't move forwards in the plot without doing so) Apparently, it's safe to read it as long as you don't take it away from the room it was stored in.
 * "Fragments of the Book of Abdul" and "De Vermis Mysteriis" in the original Alone in the Dark. The first one hurts Carnby, the latter is instant death.
 * Kingdom of Loathing has the Cookbook of the Damned, for Pastamancers to conjure infernal pastas directly from Hey Deze. The Necrotelicomnicon is also there (also known in Latin as the Liber Paginum Fulvarum.)


 * In the Call of Cthulhu (tabletop game) RPG, all the books are present, from The Book of Eibon to The Necronomicon. Books will give you knowledge of the occult, but also cause permanent Sanity loss.
 * In the Lovecraftian-style Interactive Fiction game Anchorhead, there are (appropriately) several evil artifacts, including a Tome of Eldritch Lore. Tip for players: don't read it.
 * In Tales of Phantasia, the summoner Claus main weapons are books, including the Necronomicon, Liber Ivonis, Requiem (for Shaggai), The King in Yellow, Celaeno fragments, and pretty much any other fictional grimoire from the Cthulhu Mythos. The GBA version has alternative spellings (or poor translations) of said books. Also, these books apparently weigh a ton, since Claus can use them to smack around monsters.
 * In Final Fantasy Legend III the wizard Shar can use the Tablet to free the people of Pureland from the Masters power. Since the whole game is a Shout-Out to the Cthulu mythos its most likely the Necronomicon. In the original Japanese it's a "Goblin corpse".
 * In a nod to the D&D examples listed above, Planescape: Torment has a book called the Grimoire of Pestilential Thought. Not only will it offer to teach spells in exchange for the main character doing increasingly awful deeds, it can also offer 'advice' which has a very good chance of making the main character more evil just from hearing it.
 * The Fire Emblem series has a few of these—in fact there's an entire school of magic that is dedicated to using the magic in these kind of tomes, the aptly named "Dark" magic (Although, because Dark Is Not Evil, but many think it is, some good dark-wielders call it "Elder magic".) Effects from delving deep into the dark arts often includes insanity and corruption—whereas the spells themselves are known for having interesting effects such as; Stealing one's life force (Nosferatu), Summoning a horde of voracious insects (Swarm), Exposing someone's soul to the torment of hell (Hell), making someone explode in a shower of blood (Balberith)... but the most true to the form of this trope would be the tome of Loputous in FE 4-- a book containing the power of a Child-Eating Dark God. Upon reading it, Prince Yurius went completely insane, murdered his mother (he tried to kill his adorable sister too, but she was warped away before he could)... it's effect: Halving the stats of anyone who challenges the wielder, unless said opponent is wielding the tome's opposite number, Naga)
 * Jets N Guns features the Necrofilicon, a book with such horrible grammar, that reading any part of it out loud will wake the dead in the immediate area.
 * Although Castlevania (Nintendo 64) and it's remake, Legacy Of Darkness, have the Necronomicon as their Main Menus, the book itself does not appear in either game.
 * The "CTHULHU discs" in Twilight Heroes serve this function in the digital age.
 * Loosely based on Cthulhu Mythos, several tomes are appear in Demonbane. In unusual fashion, the original copy of each grimoire appear as a young girl instead of a book (and Necronomicon is the heroine nonetheless).
 * In Persona 2, the In-Laqetti. Somewhat deconstructed in which the entire thing's a sham-but the rumors sparked by its release aren't, which jibe with Sumaru City's powers to bring all of them into reality.
 * In Shin Megami Tensei Nocturne, the Scripture of Miroku. It details how to end the world and bring a new one into reality.
 * The Gozerian Codex in the 2009 Ghostbusters game is one of these. The boss of the area uses four copies of it.
 * The events of Castlevania: Harmony of Despair take place in the Grimoire, a book chronicaling the collective history of the namesake dwelling of Dracula.

Web Comics

 * The Necronomicon was parodied in Penny Arcade and Megatokyo with the Necrowombicon, with Penny's wombat logo on its cover.
 * User Friendly mentions a Necronomicon in one strip, but it turns out it's just Cthulhu's resume a speaking engagement contract for Cthulhu.
 * A Miracle of Science has Crank Theories Of Robotics, one of a number of books which can infect susceptible persons with Science-Related Memetic Disorder, essentially an idea-disease that turns you into a Mad Scientist.
 * The plot of the webcomic Zebra Girl starts with one of these.
 * The Perry Bible Fellowship parodied it in [//pbfcomics.com/comics/book-world/ "Book World"] strip.
 * The Book of E-Ville in Sluggy Freelance, which is hinted to have power and backstory far more significant than its cutesy title suggests.
 * The Call of Whatever took a humorous approach to the Necronomicon.
 * Thingpart: "Profound Impact".
 * The Datasphere of Eight Bit Theater. What else it can do is a little vague (BM looked into it once as RM mentioned "knockers" and apparently the experience was "very soft"), but when Red Mage took a long look at it without interruption, he gained the knowledge of how to destroy anything that could ever exist. apparently couldn't exist, so what appeared to be a masterful Xanatos Gambit turned into a Batman Gambit that nearly ended the world. Only a nine-year-old brick joke saved the world from.
 * Rose from Homestuck has the "Grimoire for summoning the zoologically dubious".
 * She refused to use it as her Weapon of Choice because it sounded like a bad idea. (1) However, that didn't prevent her from using it in alchemy to make the Thorns of Oglogoth, which she does use as weapons even though no sane person should.
 * Dork Tower has it in "lovecraft is…" ([http://www.dorktower.com/2006/06/23/comics-archive-799/ …sharing that which man was not meant to know).
 * In Sinfest Tomey, Fuchsia's gift to Criminy, can be considered both this and Books That Bite.
 * And Lil' Evil has both the Necronomicon and the Origin of Species.
 * Devil Bear has one in the chapter Cover to Cover. Except all it seems to do is advertise itself to the teddy bears and then provide more fancy recipes for killing themselves in embarrassing ways than The Anarchist Cookbook. Named Mothranomicon (moths being used as hell beasts for the plushies, of course).

Web Original

 * The Necronomicon and The King in Yellow exist in the Whateley Universe, as does The First Book of the Kellith. Unfortunately for the future of said universe, that particular book was actually published as a horror novel, and it was a best seller.
 * From SCP Foundation:
 * | SCP 701, a play called The Hanged King's Tragedy is another that takes a lot of inspiration from The King in Yellow. Reading the script is safe; it even seems kind of boring, and has a happy ending, the hero actually showing mercy to the villain. However, performing it to an actual audience (a rehearsal is safe) will often cause the actors to go way off script, resulting in them and the audience killing each other or committing suicide. Those who survive often recall a character appearing whom the cast does not notice, a nobleman bound in chains with a helmet, presumably the Hanged King himself and the orchestrator of the atrocities the play has caused.
 * SCP 001 (Jonathan Ball's Proposal) seems to be a set of classified documents, but every time anyone reads them, a previously-unknown SCP is identified. Whether the documents are simply informing the Foundation of these abnormalities or actually creating them remains unknown.
 * SCP-3512, or rather, SCP-3512-2, the book which causes the condition, The More You Know, a Pick Up Artist’s Bible. (Before clicking the link, be warned, this is disturbing even for SCP Foundation.) This book, in effect, details how to make a woman an obedient Sex Slave. Initially, the book seems like something a misogynist would write, starting with a forward by Snoop Dogg (the Foundation questioned him; he claimed to know nothing about it), and for the first 11 chapters, seems like any other controversial book that dehumanizes and objectifies women. However, the next 12 chapters (all of which are labeled “Chapter 12”) become increasingly darker. They include esoteric techniques, geometric proofs, dream interpretation, self-surgery techniques, symbolism in architecture, and anomalous rituals. The true “eldritch lore” part is the 18th chapter, which details how to create a sort of homunculus made of human fat and human fingers (the latter donated by whoever builds the homunculus and possibly members of his family), which is what is used to dominate and enslave a woman you desire, although the victim eventually dies after succumbing to madness. Worst of all, the book’s writer - and likely, many of the men who buy it - is a member of some sort of cult that seems tied to Fifthism, whose lair is near a whole river of human fat. The leader of this cult being a monstrosity who seems to have grafted the donated fingers to himself.
 * SCP-140, A Chronicle of the Daevas, is one of the most dangerous in the Foundation's custody. This tome details the history of the eponymous empire, a savage offshoot of humanity that worshipped the Scarlet King and conquered and subjugated many lands, engaging in black magic, slavery, human sacrifice, cannibalism, and many other atrocities. They are mostly extinct other than some of their immortal rulers (one of which no doubt wrote this book) but every time blood or ink touches the pages, the information on them is expanded, and the date and means of how the civilization fell becomes different, always placing the date decades or centuries later. To illustrate this phenomenon, when the book was originally discovered, it claimed the Daevites were destroyed by the armies of Qin Kai in the third century BCE, but after repeated use, the book currently (as in, stated in the SCP entry) states that they were wiped out by Genghis Khan about 1,500 years later. Even worse, the history is always incomplete; it’s original owner upgraded it numerous times simply because he was curious. In theory, the book was created as a means of Rewriting Reality so as to undo the Daevite’s defeat, and if used enough times, the tyrannical Daevite Empire would be ruling the world in the present day, ultimately leading to the release of the Scarlet King and the end of everything.
 * SCP-1833 (“The Class of 76) downplays the Trope; a high school yearbook, of all things. Regardless of who reads it, the pages with pictures of the graduating class seems ordinary enough, but some pictures are missing, some of the quotes from the students seem odd (often claiming it was a great year except for one student whom everyone shows disdain for; the student's name is blacked out) and at the bottom of the page is a girl with no face and a boy with two jagged vertical slashes in place of eyes. However, if read by someone who has graduated high school (regardless of the year) the book has an odd effect, as the reader perceives it as his own high school yearbook. Initially, the contents include messages from people they knew from high school, and are positive and encouraging. But after reading 10 pages, the messages start referring to embarrassing or regrettable events (that actually occurred), and further reading includes threats and insults towards the reader, often outside of high school, plus pictures of deformed people. After 30 pages, the reader sees pictures of himself doing embarrassing things, then of himself committing or being a victim of violent crimes. The book is in fact safe to read and cannot harm the reader (it is classified as a Safe SCP) but it does make reference to many other SCPs that are incredibly dangerous, suggesting some horrible curse condemned the class of 76 at Kirk Lonwood High School to a Fate Worse Than Death.

Western Animation

 * The Simpsons parodied it. In the first Tree House of Horror, one segment features an adaptation of Edgar Allen Poe's the Raven. When the line about reading the quaint and curious volume of forgotten lore comes around, we find Home reading a book titled "Forgotten Lore, Volume III"
 * In another Simpsons, Lisa is cleaning out the garage and finds a thick leather bound book. She begins to read the Latin and behind her, a demon begins to form. However the horror is foiled when she tosses the book aside in favor of Mad Libs.
 * And again in Halloween special III where Bart and Lisa find a book in the library's "Occult section". Bart attempts to bring back their dead cat Snowball but end up raising the dead in the human cemetery, which was right next to the pet cemetery.
 * Also the members of Springfield's Republican Party read from the Necronomicon.
 * During the trial episode of season one of The Venture Brothers, Dr. Orpheus asks the bailiff to swear him in with his own book. A book that bears a suspicious resemblance to the Necronomicon. As the book snarls at the bailiff, Dr. Orpheus warns: "Careful, he's a nibbler!"
 * There's also the Orpheus' tome that Dean reads from in the ambiguously canon Christmas special episode. While perusing it for Christmas stories, Dean accidentally summons The Krampus. Orpheus was also known to read from it while baking gingerbread cookies.
 * Titanium Chef from Sushi Pack uses recipes from "The Book of Chum Chop: Ancient Recipes for Chaos and Mayhem" to perpetrate his villainy. This includes creating perfect (but emotionless) dopplegangers, opening a warp to a parallel universe, and cooking up a batch of shoeshine that makes anyone who uses it feel cold even though they're not (It Was Evil In Context).
 * The first Care Bears movie has a book that might have been considered an plain old Spell Book, were it not for the fact that it also contains the head of an malevolent spirit that coaxes its owner to cast more and more evil spells.
 * Kyle, a 12 year old boy wizard from Fanboy and Chum Chum, wields the Necronomicon.
 * Subverted in an Earthworm Jim Episode "The Book of Doom," in which the "most evil book in the universe" is revealed to be Fuzzy Wuzzy's Funny Animal Pop-Up Book. Doubly subverted in that a few copies turned out to have accidentally been printed with a page explaining how to destroy the universe, just after the pudgy-wudgy hippo.

Real Life

 * All grimoires categorically are this by definition.
 * Ancient Egypt had the Book Of Going Forth By Day — popularly known as The Book Of The Dead.
 * The book was a collection of various spells for different Pharaohs, printed on the walls of their tombs. It was essentially a collection of "prayers," or spells, but due to this, the spells were almost entirely unique to the individual. Some spells were very similar to each other, and some Pharaohs even had the exact same spells as others, but the spells were not intended to be used by anyone except the Pharaohs themselves. The spells were usually various forms of magical protection against demons in the underworld, or incantations to help one reach paradise.
 * The Thousand And One Nights aka Arabian Nights is said to drive to madness anyone who reads the entire work. It's online at Project Gutenberg for anyone who's curious enough to try it.
 * The Malleus Maleficarum definitely qualifies. It's a book written by fifteenth-century witch-hunters to record the depraved practices allegedly practiced by the diabolical witches, and the equally cruel tortures that were visited on those who were suspected of being witches.
 * Its recommendation by the reigning Pope was forged. He denounced the Malleus Maleficarium as heretical. While the Pope had inaugurated witchcraft trials in Catholic areas, overturning the 9th century canon that said believing in witchcraft was heretical, what the authors of Malleus were doing was completely outside the laws and beliefs of the Church.
 * One of the books's two "authors" had his name used on it without permission (and boy was he mad when he found out) by the guy who actually wrote it, a German monk so hopelessly obsessed with demon rape that he got tossed from every monastery he got sent to after he drove the monks up the wall by talking nonstop about said demon rape.
 * The Sixth and Seventh Books of Moses is a usually single-volume Spell Book which purports to be Older Than Dirt. It was considered by Kurt E. Koch, a German Lutheran minister, to be an Artifact of Doom because one page in the volume maintains (he claimed) that whoever owns the volume belongs to Satan. In other words, if it's on your bookshelf, Satan can do with you whatever he wishes. He maintained, therefore, all copies must be destroyed. ]
 * Two particularly famous examples, the Voynich Manuscript and the Codex Seraphinianus, are often confused with each other because they're superficially very similar: Both are encyclopedias written in an unknown language, peppered with bizarre illustrations of otherworldly biology. The Codex is a "work of art" made in the 70s, but the Voynich Manuscript dates from sometime in the 14th century, is written in what appears to be a real (but unknown) language, and is filled with illustrations that just make it more confusing.
 * TV Tropes. They're all trapped there! TRAPPED!
 * The Book of Sacred Magic of Abra-Melin the Mage, the 14th century grimoire, has stories like this attached to it. Of course, none are verifiable and S.L MacGregor Mathers and Aleister Crowley probably made most of them up.
 * Possibly the Codex Gigas aka The Devil's Bible, not due to its contents, but due to the way it was written, according to legend. The contents of this very large book (three feet long, weighing 135 lbs, so large, it takes two men simply to lift; "codex gigas" literally means "big book") include the entire Vulgate Bible and many other tomes written in the 13th Century, including the Cosmas of Prague and Isidore of Seville's encyclopedia Etymologiae, plus a striking color illustration of the Devil, which is where it got its nickname. Supposedly, this huge - for the time - book would take three decades to scribe, but legend claims a monk wrote this whole book in one night with the Devil's aid. What's puzzling is, the claim might have some merit. Handwriting experts confirm that the style is unchanged throughout the entire book, with no signs of deteriorating age, health, or mood on the part of the scribe, suggesting he somehow managed to do it in a short time.
 * The US Army field manual TM 31-210, "Improvised Munitions Handbook", is probably the best mundane equivalent. Won't summon demons, but almost any use will summon FBI agents. Unlike the other books in this list, Army field manuals are available on Amazon.
 * Adolf Hitler's Mein Kampf has started to become somthething like this. It isn't actually banned in Germany, but the copyright is owned by the government of the state Bavaria which never allowed any prints since the end of World War II. Supposedly it's a book so dangerous that it can turn normal people, or at least easily influential teens into fascist racists, so it must never be allowed to get back into circulation again. There are some attempts now to publish the content with annotations by historians to remove the myth from the book and showcase that it's really just incoherent rambling, which seems preferable to letting curious people just dig up the text on the internet on sites with doubious character.
 * The Turner Diaries. Sure, it seems like just a controversial underground novel and work of fiction written by a White Supremacist (okay, that may be a rather overt understatement) but members of American law enforcement knew this book was potentially trouble long before a great many incidents were inspired by it. Most notably, it inspired Timothy McVeigh to orchestrate the Oklahoma City bombing. One FBI agent said that when he heard of the attack, he was reminded of the book "within the hour". Also, several murders that were ruled as hate-crimes were committed by people who read this book, a full list is here.
 * Combined with Fridge Horror in this archived /tg/ thread about the works of one Theodore Seuss Geisel.
 * The Grimoire of Honorius was supposedly written by Pope Honorius III; he was evidently so holy that he got bored fighting off the temptation of the mundane world and took to summoning demons solely to turn down their offers.
 * Arguably, the Football (a briefcase containing nuclear missile launch codes, always within easy reach of the President of the United States), which in the wrong hands probably is capable of bringing about The End of the World as We Know It.
 * House of Leaves. Maybe.
 * The Mystery of the Cathedrals. Written by an alchemist in the 1920's using the pen name Fulcanelli, the work makes the case that the Cathedrals of Europe, as built by freemasons, are in fact stone manuals outlining the "Great Work" of alchemy. The work was followed by a sequel, The Dwellings of the Philosphers. A third manuscript was intended for publication, however, it was recalled by the author at the last minute due to its secrets being too dangerous for public consumption. Interestingly, the CIA had an extensive file on Fulcanelli and conducted a massive search for him in the years following WW2.
 * Many believe The Catcher in the Rye carries a curse. While it's hard to find a high school student who hasn't read it in lit class, some believe the book inspired Mark David Chapman to murder John Lennon. Chapman was obsessed with modeling his life after Holden Caulfield, the novel's protagonist, and before committing the murder, left a copy of the book for the police to find, writing "This is my statement" inside the book and signing it with Caulfield's name. The novel also seemed to be the favorite of John Hinkley Jr, the man who attempted to assassinate President Ronald Reagan.
 * The Protocols of the Elders of Zion is quite likely the most dangerous book ever written. Written around 1902, it claims to detail a secret meeting between Jewish businessmen, who discuss plans to secretly start wars, manipulate national economies and media, and form an eternal global government, all of this presented as fact. Of course, it was Blatant Lies that only exist in the fevered dreams of hate groups. More than likely the author was part of the Russian Secret Police, who wrote it with the intent to gain support for the Czar by using a minority as a scapegoat. Unfortunately, almost all antisemitic hate and terrorism (and likely all modern antisemitism in general) was either directly influenced by this book or can be traced back to it. Hitler used it as a propaganda tool during World War II; more recently, Libyan dictator Muammar Gaddafi, Al Qaida, and Hamas have all used it to spread anti-Israeli resentment in the Middle East. It has even inspired other more wide-ranging conspiracy theories, up to and including Q-Anon, which should be noted, tends to accuse George Soros (who is Jewish) as one of the masterminds behind some evil global conspiracy.
 * The Untitled Grimoires are a collection of handwritten spellbooks that were sold online in 2013 for $14,000. Written in the 1960s by a self-proclaimed High Priestess of Wicca, who specifically claimed that only Wicca like herself are allowed to read them. The first page states, “To those not of the craft - the reading of this book is Forbidden! Proceed no further or justice will enact a swift and terrible retribution - and you will surely suffer at the hand of the craft." A valid warning by an actual witch or just the rantings of an eccentric? Most don’t want to take such a risk…