Books in the Hogwarts Library. There are some contents in the books about the history of Hogwarts School of Witchcraft and Wizardry: "apparate" and "apparate" are not allowed in the school; The founder thinks that boys' ideas are more unreliable than girls'; Or boys who know magic can't enter the girls' dormitory, and so on. The legend of the Chamber of Secrets also has an explanation. Harry borrowed books from the library when the secret room was opened again in the second grade. In addition, the book also records the magic in Hogwarts air and the magic substitutes used by Muggles-such as steam engines and computers; Because of the use of magic, Muggles see only a pile of ruins at Hogwarts and so on.

Why don't Harry and Ron read this book? Harry and Ron didn't read this book when they entered school. Every time Hermione asks them "when did they start reading this book", she asks them about Hogwarts in a sarcastic tone. Hermione just looked disheartened: "Oh, maybe you should study." Rowling said she would take this opportunity to get new information about Hogwarts from Hermione. For this purpose, "Harry and Ron didn't read Hogwarts, the history of a school".