So, in chapter X, while trying to get the book with Rodric on the library, i found a bug that just prevents you from reaching it. This has happen everytime i tried to replay that specific chapter to complete the achievements.
I would found that one of the two carts wasn't there. Nothing will fix that. Not reloading the last checkpoint, starting the chapter again, or even starting way before that (i played straight from chapter IV all the way to X without closing the game, and it didn't do anything. The cart still wasn't there). It just bugs out every single time i wanna replay that chapter.