Dragon Breeding for Pleasure and Profit was a guide to raising dragons, a copy of which could be found in the Hogwarts school library collection.
Hagrid consulted the Hogwarts library's copy of this book when he first got the dragon egg that eventually hatched into Norbert (PS14). Pages of this book include "Essential Equipment," "Recognising Dragon Eggs," a map showing "Dragons of the World," and "A-Z Of Ailments" (JKR, DrBr).
During one of the initial screen tests for the first film, Daniel Radcliffe exchanged lines with someone off screen. He looked at a book and said, "Dragon Breeding for Pleasure and Profit, copyright 1658." The voice offscreen replied, "It's a bit out of date..." (https://www.youtube.com/watch?v=F7KbQLJLBAo&ab)
Tags: dangerous illegal library books pets