THE BIGGEST SUDOKU COLLECTION YET Carol Vorderman, international Sudoku expert, has done it again In Master Sudoku , she introduced America to the popular new number logic game, taking players from novice to expert in 200 puzzles. Now, she brings us Carol Vorderman's Massive Book of Sudoku , the largest collection ever--containing more than 400 puzzles ranging from easy to super difficult, as well as several new, ultrachallenging kinds of Sudoku for...