There's no better way to unwind on your downtime than with a KenKen puzzle"”or better yet, two hundred of them! So whether you're hitting the road or simple lounging in the backyard, your vacation begins the moment you pick up a pencil!  Includes: 200 easy to challenging KenKen puzzlesPuzzles range in size from simple 3x3 grids to mindbending 9x9 grids Introduction and solving instructions by puzzlemaster Will Shortz Tetsuya Miyamoto, the creator of KenKen, is a math teacher. He developed KenKen to help his student develop their calculation and logic skills. He runs a unique mathematics class for grade school children in Japan where he practices The Art of Teaching Without Teaching. His teaching method and use of KenKen in his classroom have proven extremely successful. His students regularly go on to be accepted at the most prestigious schools in Tokyo. Logic & Brain Teasers Puzzles