Super Sudoku - Puzzle Books Author:Parragon Books Are you a bonafide sudoku addict? If so, this book will be your perfect take-anywhere companion. Over 500 unique puzzles include four difficulty levelsranging from a gentle warm up, through challenging and tough to the mind-boggling samurai sudokumaking this collection a real treat for anyone with a keen eye for logic. Are you ready to rise to a... more »n extreme sudoku challenge?« less