Book excerpt: The Great Houdini's Puzzle Vaultcontains 100 puzzles inspired by the greatest escapologist ever to have lived. With puzzle chains where one wrong answer can leave you locked in a never-ending circle of puzzles, and logic problems designed to confound the mind, this puzzle book is an enjoyable test for all. From spotting patterns in order to unlock safes, to figuring out what is wrong with the Vaudeville theatre audience, these puzzles each follow the life and times of Houdini and his mystifying counterparts in the early-twentieth century magicians' world.