KenKen is a crafty game; change a few numbers around and what was once a quick and easy puzzle is now a mind-melting challenge! And that challenge is what puzzle fans love best. And it's also a great way to keep your mind sharp. So Will Shortz is back with this volume contains 100 challenging KenKen puzzles. The puzzles range in size from 6x6 grids to 9x9 grids. So grab a pencil and and enjoy this fun way to strengthen your mind!*Refresh and renew the \"little grey cells\" with 100 challenging KenKen puzzles*\"How to Solve\" instructions and an introduction by puzzlemaster Will Shortz *Big grids with lots of space for easy solving | Will Shortz Presents Brain-Busting KenKen by Tetsuya Miyamoto, Paperback | Indigo Chapters