For all of you still living in the world of Gravity Falls, Alex Hirsch has brought back his most nefarious of villains – Bill Cipher. The Book of Bill is Bill’s chance to tell his story, from his evil origin to an interactive array of puzzles and ciphers, all brought to you by the mastermind himself. This is Gravity Falls as you’ve never seen before. Even better, the Barnes & Noble exclusive brings you even more Bill and features a gold foil jacket with 16 extra pages of Bill's twisted life advice.