1895905
9781402718298
First you seen one thing, then another. The picture changes from one moment to the next, flip-flopping back and forth. That's an ambiguous illusion, and the ones in this collection offer constant, pleasurable surprises.Seckel, Al is the author of 'Ambiguous Optical Illusions', published 2005 under ISBN 9781402718298 and ISBN 1402718292.
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