(4) 4-6 Illustrated by Frances Zweifel. Scientific concepts behind tricks that play with our perception of motion, depth, shape, and size are revealed in this well-organized experimental guide. Although the layout is cramped and gray, with dark line drawings and diagrams, the book contains complete directions for making a wide variety of optical illusions, each matched with concise explanations of how particular illusions occur. Ind.

Reviewer: Jim St. Claire