2 Books in 1! Grab a pencil to put your skills to the test!  Improve Your Memory, Concentration, Creativity, Reasoning, and Problem-Solving Skills Esteemed puzzle master David Millar along with American Mensa®, the smartest brand in the world, bring you logic and problem-solving puzzles in the form of both word and number challenges. The range of puzzle types include: MazesSudokuStory logicBlank-filling puzzlesRiddlesAnd more! The hours of brain-training fun will help you improve your memory and exercise those mind-muscles. This book can be used and appreciated by anyone who wants to keep their mind sharp and in tip-top shape—something absolutely everyone will benefit from.