Combines two previously published works, resulting in ninety-three brain-teasing puzzles, riddles, and questions with an emphasis on humor.

The path least traveled makes all the difference in this volume, especially when you find yourself crossing bridges, escaping from caves, lighting firecrackers, spelling out passwords, and untangling snakes. These 50 challenges include classic, solid, and ripple mazes, along with short-path and avoidance labyrinths and other intriguing problems. Solutions.

Explains various methods used in cryptography and presents examples to help readers in breaking secret codes

A collection of math and logic puzzles features number games, magic squares, tricks, problems with dominoes and dice, and cross sums, in addition to other intellectual teasers.

Fair, witty appraisal of cranks, quacks, and quackeries of science and pseudoscience: hollow earth, Velikovsky, orgone energy, Dianetics, flying saucers, Bridey Murphy, food and medical fads, and much more.