The Restricted Section of the Hogwarts library is just that; restricted. Here, you will find old and fragile books, tomes on more advanced and possibly Dark topics… books, in short, that can't be kept where just anyone can get to them. Should you need to access this area, just approach the librarian with a permission slip from a professor. This will allow you to obtain the book that you need.

Do not, under any circumstances, enter the Restricted Section without permission. The librarian is happy to help… but she won't tolerate unauthorized access to this section.