It's a pocket-size brain gym. Here are more than 500 full-color puzzles from the original <i>Big Book of Brain Games</i>—the book that Will Shortz praised as “the most wide-ranging, visually appealing, entertaining collection of brainteasers since Sam Lloyd's <i>Cyclopedia of Puzzles</i>,” and <i>The Washington Post </i>called “an opus . . . mixing math with wonder.” <br><br>Here are mental games, visual challenges, logic posers, riddles, and illusions, each designed to stretch neurons and give the brain a workout—all in a format that will fit in your pocket. The puzzles (both original and mind-boggling adaptations of classics) are rated in difficulty from level one to ten, but even the easiest are guaranteed to make the solver feel smart. <br><br>Can you cross the Impossible Domino Bridge? Break through the Queen's Standoff? Wield the Sickle of Archimedes? <i>The Little Book of Big Brain Games</i>: salted peanuts for the mind.