This is probably the most delightful, amusing, bamboozling, fascinating, tantalizing, stimulating, baffling, entertaining, mysterious, flabbergasting, mind-bending, fiendish and thought-provoking: puzzles, riddles, trivia, detective challenges, perfect crimes, mystery stories, brainteasers, real world intrigues, treasure hunting, creative thinking and problem-solving book, ever! The 600 questions are designed to be varied, interesting, amusing and challenging. Whether for occasional browsing; or relaxation on a holiday; or enjoyment on a plane or train journey; or as a source of stories, quiz questions and jokes to share with your friends and family; or as a distraction; or as a present for that person, you cannot think what to buy! The puzzles will entertain you, boost your mental powers, inspire your creativity, encourage you to rethink and test your assumptions and help you to learn to tackle problems in different ways. They promote imagination, ingenuity, originality and inventiveness. Many of them will make you think out-of-the-box. Solving challenging puzzles and exercising your mind have been found to be as good for your brain as running and strength training are for your body.