New York Post Wicked Su Doku: 150 Difficult Puzzles
The official utterly addictive number-placing puzzle
Something wicked this way comes! These all new Difficult puzzles will push you to the limit. 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!