4About the original 1000 PlayThinks, Will Shortz of The New York Times said it best: "The most wide-ranging, visually appealing, entertaining, gigantic collection of brainteasers since Sam Loyd's Cyclopedia of Puzzles almost a century ago." Inside The Big Book of Brain Games, you will find an obsessive collection of 1,000 challenges, puzzles, riddles, illusions--originals as well as must-do classics--it's like salted peanuts for the brain. With jampacked pages and a full-color illustration for each entry, the book, opened anywhere, is a call to action. (And it's guaranteed to make you smarter.) Twelve basic categories include Geometry, Patterns, Numbers, Logic and Probability, and Perception. An easy-to-read key at the top of each game ranks its difficulty on a scale of 1 to 10, while indices in the back cross-reference the puzzles. (You'll find the answers back there, too.)