It's interactive fun for the whole family! The Life Picture Puzzle books are a publishing phenomenon, New York Times bestsellers, with 1 million copies in print in just ten months. The concept is simple, entertaining, and utterly addictive: Each page features two full-color photographs that at first glance appear identical. But they contain differences, from the relatively obvious to the maddeningly subtle, that it's the reader's job to spot. The puzzles are organized into four increasingly difficult categoriesNovice, Master, Expert, and Genius. Solutions are printed on the back of each page.