From ancient riddles to modern Sudoko, people have been fascinated by puzzles. Whether they are seen as a glorious waste of time, a harmless way to spend a train journey or a valuable way of exercising the mind, the lure of puzzles has been irresistible. By using over 100 examples of the most mindbending, the most challenging, the most satisfying, or simply the most humorous puzzles throughout the ages, William Hartston traces the development of brainteasers...