Miserere: An Autumn Tale

Miserere: An Autumn Tale is a dark fantasy novel by Teresa Frohock. In the Woerld, they keep endless guard to prevent Hell from escaping to attack Earth. But Catarina has instead made a deal with a devil and is going to unleash them. Her captive brother Lucian takes a chance to escape, and has to rescue a foundling -- a character brought from Earth -- by magic he is forbidden to use, which sets the opposing forces against him as well.

Tropes included

 * All Myths Are True: Any religion can hold off the demons.
 * Bearer of Bad News: Raechel tells Lucian, and has him tell Lindsey.
 * Blood Magic: Names written in blood are especially powerful.
 * Cain and Abel: Lucian and Catarina.
 * Charm Person: Catarina gains a voice that causes this.
 * Children Are Innocent: One character warns against trusting this trope.
 * Cold-Blooded Torture: Catarina inflicts it.
 * Cool Sword: Don't steal their swords. It doesn't work for you.
 * Damsel in Distress
 * Deal with the Devil: Catarina has struck one
 * Dude in Distress: Lucian
 * Dreaming of Things to Come: Most people in Woerld can't dream. If you dream, it is prophetic.
 * Due to the Dead: Rachael does it for Lucian's sake, not the dead woman's.
 * Evil Is Deathly Cold: Catarina's amulet
 * Evil Uncle: Lucian and Catarina's back story
 * Familiar: Cerebus.
 * A Friend in Need: Lucian to Lindsey
 * Glad To Be Alive Kiss: They remember their past in time for it to stop.
 * Go On Without Me
 * Green-Eyed Monster: Catarina
 * The Hedge of Thorns: The Rosa's purpose.
 * Herald: A priest sends Lucian on his escape.
 * Human Sacrifice: Catarina's plan.
 * I Know Your True Name: Part of the magic
 * It's All About Me: Catarina
 * It Was a Gift
 * Light'Em Up: The light spell
 * Light Is Good: Only good guys can cast the light spell.
 * Like a Son to Me: What John had said to Lucian when he was convicted.
 * Love Triangle: A sister and lover toward Lucian -- because Catarina insisted on it.
 * Magic Feather: Lucian explains that Lindsey is the source of the power, not the Psalter, which he merely gave her to help her focus.
 * Mordor: The Barren
 * Naive Newcomer: Lindsey
 * Our Ghosts Are Different
 * Parental Substitute: Lindsey explicitly contrasts Lucian's pride in her with her own father.
 * Peaceful in Death: Rachael thinks on the aversion.
 * Power of Love: Matthew's ghost tells Lucian that God's power, based on love, is stronger.
 * The Promise: Lucian's, to his sister.
 * Protective Charm: Lucian tells Lindsey that the Psalter is this.
 * Protectorate: Catarina to Lucian. This is a problem.
 * Rule of Three: Lucian denies Catarina three times.
 * Scars Are Forever: Lucian's limp
 * So Proud of You: Lindsey picks this up when he tells her she's Katharos.
 * Tears of Blood: Katharos shed them on contact with the Fallen
 * Tears of Fear: Lindsey asks if you're whiney to shed them.
 * Tears of Joy: At one point, Lucian think he could shed them.
 * Thicker Than Water: An argument Catarina uses on Lucian
 * Title Drop
 * Trapped in Another World: Everyone who comes through the Veil.
 * Unable to Cry: It takes Lucian some time
 * The Unfavourite: Lindsey
 * When Trees Attack: The Rosa moves.
 * You Can't Go Home Again: Characters are brought into the Woerld, but never out.