Why Sudoku Puzzle? It keeps you practicing your logical thinking process when you are solving a puzzle, and eventually improve your number skills. Reduces the chances of developing Alzheimer's by keeping your brain active. Learns to do things quickly. Not only playing Sudoku is interesting but it helps to increase your sense of time. Whether you want to keep your brain young and active to challenge yourself at home. Book Features: All are unique puzzles. Bigger print for easy to read (even by campfire light). Each puzzle has a solution - provided at the back of the book. Given instructions and techniques to complete the problems. It will be a great gift or challenging think on you. So why are you waiting? Scroll Up and Click to Buy Now!