Yeah they can pull the counselor's bookshelves off the walls. The one directly to the desk's left hides a small wall safe with a 4 digit code, currently set at 0000

There's sticky note tabbed bookmarks here and there, mostly marking passages where specific real life examples are given, but also typical main topic locations. There are no annotations in any of the books and the counselor is the only person who touches these books so there are no love letters ):