Optical illusions are fun to look at and studyA-and when presented in a book like this one, they make great puzzles for readers to solve. The Big Book of Optical Illusions displays more than 200 eye-foolers, all of them guaranteed to confuse while they also entertain. Optical illusions take many different forms, and this book features the best of themA-ambiguous and impossible depictions of spatial areas, hidden objects contained in an illustration, color and brightness effects, size and shape misperceptions, the illusion of moving patterns, and image paradoxes. Readers will also find a glossary and a gallery of classic illusions. Full color throughout, with illustrations on most pages.