Will Shortz Presents Brain-Training KenKen : 100 Challenging Logic Puzzles That Make You Smarter

Boost your brainpower with KenKen This collection of KenKen will help you flex your mental muscles. So grab a pencil and see if you're a KenKen master Includes: - 100 challenging KenKen puzzles - Puzzles that range in size from easy 5x5 grids to mind-bending 9x9 grids - Introduction and solving instructions by puzzlemaster Will Shortz