This is book themed puzzle box is a fully functional customizable puzzle box.  This model is supplied unassembled and unpainted and includes instructions.  This is a great themed puzzle for physically hiding critical information in for your players that you want them to have to discover clues to solve the puzzle.  

There are two primary variations of this puzzle that are very similar.  Style A has runes on the dial while style B is slightly more difficult to decipher.  The Necronomicon version is the same puzzle, but reskinned to resemble the Necronomicon.