The noted expert selects 70 of his favorite "short" puzzles, including such mind-bogglers as The Returning Explorer, The Mutilated Chessboard, Scrambled Box Tops, and dozens more involving logic and basic math. Solutions included.

Second collection of amusing, thought-provoking problems and puzzles from the "Cyclopedia." Arithmetic, algebra, speed and distance problems, game theory, counter and sliding block problems, similar topics. 166 problems. 150 original drawings, diagrams.

This classic by a famed puzzle expert features 700 tangrams and solutions, plus a charming satirical commentary on the puzzle's origins, its religious significance, and its relationship to mathematics.

This collection gathers together nearly 330 tangrams, the best creations of both Chinese and Occidental puzzle devisers. Puzzles range from the relatively easy to the difficult.