Book - Brain Training - Sudoku Special

   <p><br />Do you enjoy intellectual challenges?   <br />So get your brains working, because there are more than 150 puzzles you'll have to tackle. Face 4 levels of difficulty: “Easy”, “Medium”, “Hard” and “Expert”, to progress at your own pace while stimulating your mind. Whether you're a beginner or an experienced player, there's no doubt that these new challenges will make you think and keep your brain in great shape!</p>