by None (Author)

If puzzles are your poison, you'll find this utterly addictive collection of FIENDISH su dokus is a killer...in the best possible way

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The OfficialUtterly AddictiveNumber-Placing Puzzle

This Fiendishly tough collection might just be a lethal dose of puzzles. More than just hours of entertainment, Su Doku engages your mind, improves your concentration, and helps you stay mentally fit. With 150 brand-new puzzles to complete, you'll become a Su Doku master in no time!