More than 60 new puzzles and stunts based on the properties of numbers. Easy techniques for multiplying large numbers mentally, identifying unknown numbers, determining the date of any day in any yea
Written by the master magician himself, this fascinating work reveals the secrets behind how Houdini escaped numerous death-defying stunts and exposed a variety of fake spiritualists. He also gives in
Perfect for trips, rainy days, or downtime, these 58 word searches—created by the expert editors at Puzzlewright—will entertain kids for hours. You’re never too young to start having
Perfect for trips, rainy days, or downtime, these puzzles—created by the expert editors at Puzzlewright—will entertain kids for hours. You’re never too young to start solving—a
Thorough, systematic introduction to serious cryptography, especially strong in modern forms of cipher solution used by experts. Nihilist, grille, U. S. Army, key-phrase, multiple-alphabet, Gronsfeld,
