Giant Book of Optical Puzzles

Optical illusions trick your mind and confound your perception, and that's why these images--including three-dimensional mazes--will drive you crazy in the best of ways. Stare at a circular checkerboard closely; it will seem to pulsate and shimmer. And do those black-and-white patches actually link up to form the petals of a flower? Determine which twin brother has a bigger appetite by glancing at a drawing of both. (These guys don't look the same...or do they?) The only thing that won't be an illusion is the fun you're having.Kay, Keith is the author of 'Giant Book of Optical Puzzles', published 2003 under ISBN 9781402710513 and ISBN 1402710518.