Will Shortz Presents Ferocious Ken Ken

Will Shortz Presents Ferocious KenKen is a kenken puzzle book containing 200 challenging logic puzzles that make you smarter. Published by St. Martin's Griffon.

KenKen has quickly become the successor to sudoku that the world's been waiting for! KenKen became the first puzzles to be printed in the daily editions of the New York Times next to its famous crossword puzzle.