That's right upstairs ... but according to what I have learned in the library, when there are damaged books in the library, readers should not repair them themselves, but should first get them from the librarian and tell them the dilapidated condition of the books, and then the professional librarian will repair them. The reason why libraries don't want readers to repair books by themselves is that book repair is also a science, and special tools and skills are needed to repair books intact. Readers have no training in this field, and even if they seem to be good at repairing books, they are still relatively poor. You'd better take the book to the librarian for repair first, and then borrow it.