The instant #1 New York Times bestseller! Did you miss him? Admit it, you missed him. The demon that terrorized Gravity Falls is back from the great beyond to finally tell his side of the story in The Book of Bill, written by none other than Bill Cipher himself. The instant #1 New York Times bestseller! Did you miss him? Admit it, you missed him. The demon that terrorized Gravity Falls is back from the great beyond to finally tell his side of the story in The Book of Bill, written by none other ...