Use it or lose it! It’s important—for mature adults especially—to stimulate and challenge the brain constantly. Keeping the mind active may ward off such illnesses as Alzheimer’s, and help maintain mental sharpness. Puzzles are a perfect way to achieve that goal, so AARP has devised a delightfully challenging collection of the most popular puzzles around: sudoku, the highly addictive game that everyone from kids to great-grandparents are snatching off store shelves. An introductory section will get newcomers started with an easy-to-follow explanation of the rules and a step-by-step demonstration of how to go about filling in the grids. Because this comes from AARP, the organization most trusted by older adults, you know it’s top-quality!