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

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Give your brain a healthy workout—Anytime, Anywhere. Not just any book of games, this collection by the bestselling author of 399 Games, Puzzles & TriviaChall

More than 400 brain-jogging puzzles give you a crash course in cryptography, while the messages reward you with the comedy of Jay Leno, Elayne Boosler, and Jerr