Giant Book of Optical Puzzlesby Charles H. Paraquin, E. Richard Churchill, Keith Kay, Katherine Joyce
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.
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