Puzzle enthusiasts will enjoy testing brain skills with KenDoku -- a new puzzle introduced by the same people who launched KenKen. It combines the features of KenKen with those of sudoku. KenDoku comes in two different grid sizes, 6x6 and 9x9, so everyone can choose the size that best matches the time they want to spend on a puzzle and their own solving skills. Within each grid size the puzzles come in a wide range of levels of difficulty. One of the key features of KenDoku is the fun that can be had from using logic combined with the simple basic arithmetic skills: addition, subtraction, multiplication and division. Developed by David Levy & Robert Fuhrer, KenDoku is available through www.sevenfooterpress.com