The Armchair Universe, a collection of A.K. Dewdney's articles in the Computer Recreations section of Scientific American, contains pages of the most interesting pursuits you'll find anywhere. With subjects such as Infinite Graphics, Mathemagadgets, Artificial Intelligence and Artificial Insanity, and Life in Automata, among others, it's guaranteed that you will find a number of thought-provoking and technically interesting articles. To enjoy the book fully, either a small amount of knowledge about computer programming, or the drive to learn is a must. The majority of articles outline simple methods for examining the curiosities put forth on your own computer. This greatly facilitates the amount of knowledge you will pick up by reading this book. Overall, this is one of the most interesting, fun books I have ever read.