Are You There, God? It's Me, Margaret./YMMV


 * Margaret Is Non-Controversial: It would probably be seen as a very tame book by today's standards, but the frank and open depictions of puberty (although common for Judy Blume books) were seen as controversial and perhaps even obscene in the 1970s when the book was published.
 * This troper read it in 1976, only a few years after it was first published. It wasn't seen (at least among my friends and their parents) as obscene, so much as information for girls only, don't discuss it with boys, don't show it to boys. And boys publicly disdained this "girl's book". However, quite a few guys of my generation later admitted to reading it on the sly, just out of curiosity about what all the fuss was about.
 * Puppy Love: Filled with it, seeing as it's a book about puberty.