The UKs bestselling TV presenter & number-cruncher produces the best book on the puzzle phenomenon. Carol Vodermans collection contains over 200 puzzles & step-by-step instructions to help you complete your puzzles record time! Watch as Carol talks you through entire puzzles eliminating guesswork & fine-tuning your skills. There are also against-the-clock time challenges & a scoreboard to help you measure your growing skill. The definitive guide to the fiendishly addictive number puzzle.