I was under the assumption you had to look in the bookshelf after gaining the flashlight and read the deja vu book, but you can only access it once so be careful- I would give u the code but I wasn't paying attention while reading it lmao
okay pretty sure its was confirmed you had to get the padlock code via reading the deja vu book, but there are no numbers whatsoever inside the text boxes. There are a total of 7 text boxes for the book, though, if that means anything