Not just any book of games, this collection by the bestselling author of 399 Games, Puzzles & TriviaChallenges Specially Designed to Keep Your Brain Youngis expertly created to keep your brain in tip-top shape—even while you’re on the go. With its shorter puzzles and portable size, it’s perfect for getting your cognitive exercise in while waiting at the dentist’s office, traveling, or whenever you have a few spare minutes to challenge yourself.