Use it or lose it Crosswords and other mind-flexing puzzles can perform an anatomical impossibility: They keep the brain on its toes Stay mentally fit and max out your mind with these marvelous crosswords, created in association with AARP. The perfect brain-bending workout, they test your smarts on vocabulary and classic knowledge, not hip-hop allusions or esoteric clues. The puzzles feature an easy-to-read font, inviting solvers to dive right in on deciphering the clues. Each collection features 50 great puzzles in a spiral-bound book that lies flat as you solve.