Mensa Keep Your Brain Fit Author:Robert Allen The brain is a muscle just like any other part of the body, and must be exercised in order to stay fit. This fabulous selection of colour puzzles from Mensa, the world-famous high IQ society provides a progressive opportunity to develop your puzzle-solving abilities. Filled with puzzles and challenges designed to test your brain, as well as help... more » it to strengthen and stay in good shape, this book is perfect for upping the fitness of your cranium.« less