What is this book about? I am going to show you a number of games that the magician or gambler plays against a spectator one on one. The spectator gets a free choice of the objects that are used in the gambling game. ( Some games use cards, dice, pieces of paper, spinners, etc.) For example, say the spectator has a choice of four dice. Spectator picks one die and the magician picks one die. Each rolls their die, and the high number wins. Whoever wins a best of 12 game match wins the game. Unfortunately for the spectator, the magician will almost always win the match. The probability will ALWAYS be in the magician's favor. There is no sleight of hand or funny business. These type of games are called non transitive games.