You clue is in one of the bookshelves outside of the room. Should be the one in the far left of the bedroom.
Yeah i have done this just says the stupid numbers 2042 or something stupid like that still stuck and could use an actual guide or help please not stupid vague answers have wasted a literal whole day just on this part and im getting nowhere
Pull the books out in the library shelves in that same order the numbers say. If it says 2, should have 2 books pulled out.