As we all know, this is a forum for Kingdom Hearts. Even so, if anybody posts spoilers for Endgame anywhere on this site without spoiler tags, you will be banned.
If you change your avatar to something related to Endgame, you will be banned.
If you put something in your signature, send a message to somebody that is visibly seen, or share spoilers with somebody who does not wish to see them, you will be banned.
It's been a while so I can't remember exactly where specific books are but I can tell you they're all in the library. Perhaps some of them are behind the rotating shelves? They're in there somewhere, you just have to be thorough. Don't worry about checking anyplace else. I think some may be laying on top of shelves as well.