I'm impressed you got the first code! That was the more difficult one to get, and i should've explained it better, a patch is coming after the voting period ends to make the puzzles more coherent! The texture bugs came from trying to fix an issue were they didn't show for some people at all, so i had to make some sacrifices.
The second code you just put the colored numbers that were found behind the planks in order to the colored books on the main bookshelf.
Thank you for the review!