<p>The Official Utterly Addictive Number-Placing Puzzle</p><p>Swing into spring with Su Doku! These all-new Easy to Medium puzzles are the perfect way to enjoy the sunny days ahead! 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!</p>