Sudoku Puzzle Book 400 Giant Size EXTRA HARD Puzzles: One Gigantic Large Print Puzzle Per Letter Size Page (Sudoku Puzzle Books Einstein Series) (Volume 51)

Pick up a Sudoku book today and improve your brain power!. It has also been shown to reduce the chance of developing Alzheimers. You might not be an Einstein but you can really sharpen up your mind and improve your memory by playing Sudoku every day. This book contains 400 giant size puzzles. Each gigantic puzzle fills a full page and solutions are at the end of the book. Sudoku stimulates your mind by helping you practice your logical thinking process, increases concentration and makes you feel happy by giving you a sense of accomplishment