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New York Post Train Your Brain Su Doku: Fiendish
New York Post Train Your Brain Su Doku Fiendish Author:Wayne Gould The official utterly addictive number-placing puzzle Give your brain a workout with these all new Fiendishly tough puzzles. Their addictive power will not only entertain--Su Doku puzzles engage your mind, improve your concentration, and help you stay mentally fit. There's no excuse for slow thinking and flabby wits when you can train your brain... more » Beware of pale imitations. These are the original and official Su Doku puzzles by Wayne Gould--"New York Post"'s Su Doku puzzle master and one of "Time" magazine's Most Influential People.« less