Brain Games #2: Lower Your Brain Age in Minutes a DayPacked with mental challenges and puzzles that can keep your mind young and fit. Challenges and puzzles get more difficult as you work through the book. Self assessment quizzes help you gauge your progress. The book includes helpful information about brain fitness overall, as well as tips on getting the most out of the puzzles. Just as no single exercise machine can give you a full workout, no one type of mental challenge or puzzle will fully exercise