I’m looking at some possibilities, for example:

How the displacement of the books in the library might sign something…
How the numbering of the bookcases on the wiki might not be the best on trying to find an pattern of what is and isn’t on the correct order.

How much the bookshelves with zero books might be something on the entire cypher…

And some other things… let’s see what I can come with in the future (I’m also dedicating some time to npc talking so who knows)