Will Shortz Presents Puzzle-a-Day: Hard KenKen : Will Shortz Presents Pocket Puzzle a Day: KenKen is the perfect travel companion. It's stylish and compact design makes it easy to bring along on any trip whether it's your daily commute or holiday vacation. The pad allows you to access puzzles easily and the hardcover provides a sturdy solving surface. NOTE: This is a Scratch and Dent book and may have noticeable dents, scratches and various other cosmetic issues as well as torn or missing dust jacket. These items are only guaranteed to be structurally complete and readable and therefore are sold as is.