It's a pocket-size brain gym. Here are more than 500 full-color puzzles from the original iBig Book of Brain Gamesi--the book that Will Shortz praised as the most wide-ranging, visually appealing, entertaining collection of brainteasers since Sam Lloyd's iCyclopedia of Puzzlesi, and iThe Washington Post icalled an opus . . . mixing math with wonder. pHere 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. pCan you cross the Impossible Domino Bridge Break through the Queen's Standoff Wield the Sickle of Archimedes iThe Little Book of Big Brain Gamesi salted peanuts for the mind.