Book excerpt: In this compact and colorful book, Robert Ausbourne (b. 1947) presents a crystal-clear dissection of a variety of confounding optical illusions. His text and vivid illustrations explain how illusions work and how you can make your own, using just basic drawing and computer skills. As Ausbourne says, "If you are human, you already have the basic skills necessary to study illusions." The thirty-seven projects presented in How to Understand, Enjoy, and Draw Optical Illusions will fascinate young and old, everyone who enjoys untangling how the mind works and the eye sees. Art and science teachers, graphic designers, and artists alike will find it indispensable.