Will Shortz Presents The Ultimate KenKen Omnibus: 500 Easy to Hard Logic Puzzles That Make You Smarter

Perfect for solvers who just can't get enough, this colossal collection contains 500 easy to hard KenKen puzzles -- perfect for novices and experts alike.

Features:
· 500 easy-to-hard KenKen puzzles
· Edited by legendary New York Times crossword editor Will Shortz
· Big grids with lots of space for easy solving