HarperCollins Publishers Ltd.: New York Post Blizzard Su Doku (Fiendish)

The Official Utterly Addictive Number-Placing Puzzle

Extreme Su Doku weather alert! There's a blizzard of fun heading your way with these all new Fiendish puzzles for the hardiest of Su Doku fans. 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!