Sharpen your mind with fun, brain-boosting sudoku puzzles for adults Sudoku is an entertaining way to improve memory and cognitive skills. Doing puzzles keeps your mind active and helps support its inherent ability to learn and rejuvenate. Get plenty of skill-building sudoku with The Ultimate Brain Health Sudoku Puzzle Book for Adults. All you need is a pencil, an eraser, and a little perseverance. For all adults—Build brain health, whether you're actively seeking to improve your memory or just an avid puzzler looking for fun new material. Choose your level—Decide how much of a challenge you're in the mood for with sections for Warm-Up, Easy, Medium, and Hard puzzles. Bonus tips—Get started right away with a quick primer on how to solve sudoku, plus strategies throughout for when you're stuck. Go beyond other sudoku puzzle books with one that's designed to keep your mind and memory in shape.