Maybe the books are so boring that almost no one wants to read them. Hermione was an unlikely exception, and under usual circumstances no one else would bother reading the books. On the other hand, the library might have magical protection against damaging books.
Maybe the books are so boring that almost no one wants to read them. Hermione was an unlikely exception, and under usual circumstances no one else would bother reading the books. On the other hand, the library might have magical protection against damaging books.
Well, if they have access to the dorms, they could steal the books and replace them with altered copies.