Will Shortz Presents the Big, Bad Book of KenKen: 100 Very Hard Logic Puzzles That Make You Smarter

Will Shortz Presents Ferocious KenKen: 200 Challenging Logic Puzzles That Make You Smarter

Are you tough enough?

Tkae on this collection of 200 devilishly difficult KenKen puzzles!

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Are you tough enough?

Tkae on this collection of 200 devilishly difficult KenKen puzzles!

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