A collection of ingenious puzzles designed to delight even the most devious mind, is sure to whip your gray matter into shape. From maddening Mondrians to complex cryptomath, these challenges work both the left and right sides of your brain, and everything in between. Starting out slowly, warms up those thinking muscles before gradually descending into mind-boggling, multistep logic puzzles that will have your brain muscles burning. If you intend to keep your wits sharp, then grab a pencil, a timer, crack open this book, and start weaving your way through the maze of riddles, enigmas, and brain teasers, keeping score as you go. By the end, you'll know how big your brain is (or isn't), and how much fun it is to exercise your mind.