Based on the science that shows that people middle-aged or older who solve word games and brainteasers have a significant cognitive advantage over those who do not, 399 Games, Puzzles & Trivia Challenges is the illustrated game book specifically created to cross-train the brain. Here are 399 games to stretch, challenge, and push the reader, all of which stimulate the formation of neurons - literally, regrowing the brain. Plus they're not only good for you, but just plain good - these games are fun. 399 Games, Puzzles & Trivia is a lively mix of challenges, riddles, and brainteasers - all vetted by a neuroscientist who specializes in aging brains and designed to work the six key areas of cognitive function that are vulnerable in normal aging. In just 15 minutes a day, anyone can improve his brain's strength, flexibility, and long-term health.