It's a scientific fact: mental fitness demands at least 20 minutes of hard exercise daily. Puzzles provide the perfect way to give the brain a rigorous workout. A wonderfully intriguing collection of over a thousand specially commissioned riddles, mysteries and verbal conundrums, the Book of Puzzles & Brain Teasers is guaranteed to build analytical, creative and practical thinking power while beating boredom.A spiral-bound book designed to lie flat for easy use, complete with a felt-tip pen and four wipe-clean acetate sheets to allow each puzzle to be done again and again.All rated with a level of difficulty, from 1 to 3, puzzles are gathered into seven chapters to appeal to a wide spectrum of mental skills including: -- Mind Mazes, perceptual-twisters galore to keep neurons charged and eyes sharp-- Word Power, crosswords and anagrams to bolster linguistic abilities-- Figure It Out, mathematical mazes and calculating challenges to master numbers-- Tricky Trivia, quizzes to probe wide-ranging knowledge and boost recall