It defies logic! At least, that's what puzzle-doers will think as they work their way through this largest-ever compendium of geometric conundrums. When you look at these images - some classic, others never-before published - you'll have a hard time believing what the captions say about their size, shape, or other geometric aspect. For example, two tables appear radically different to the naked eye - but they're actually identical in size and shape. It's all a matter of perspective and perception. Each puzzle is eye-opening. Full colour optical illusions Third title in the Super Visions series of optical illusion puzzles The largest-ever compendium of geometric conundrums.