Hollow Bastion Library books

The Hollow Bastion Library books is a puzzle in the Library of Hollow Bastion in Kingdom Hearts. It involves Sora finding books and then placing them in the appropriate bookshelf so that they slide back to reveal new areas and items.

Story
To reach the second floor of the Entrance Hall, Sora must complete a puzzle in the Library. There are eight books to be found, all of which have been misplaced throughout the Library. Upon placing a book in its respective slot, the bookshelf the book resides in will move. Most of the bookshelves must be moved in order to clear out a path, while two others block the entrance to a Lift Stop. However, behind one bookshelf is a red button that unlocks a door leading to the upper layer of the Entrance Hall.