Will Shortz Presents Terrifying Kenken: 100 Very Hard Logic Puzzles That Make You Smarter, Paperback

Are you up for the challenge? This collection of KenKen has the puzzles to put your solving skills to the test. So grab a pencil and see if you're a KenKen master.

Includes:
*100 fearsome KenKen puzzles
*Puzzles range in size from simple 3x3 grids to mind-bending 9x9 grids
* Introduction and solving instructions by puzzlemaster Will Shortz

About the Author:

TETSUYA MIYAMOTO, the creator of KenKen, is a math teacher who 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 has proven extremely successful. His students regularly go on to be accepted at the most prestigious schools in Tokyo.

WILL SHORTZ has been the crossword puzzle editor of The New York Times since 1993. He is also the puzzlemaster on NPR's Weekend Edition Sunday and is founder and director of the annual American Crossword Puzzle Tournament. He has edited countless books of crossword puzzles, Sudoku, KenKen, and all manner of brain-busters.