Over 150 mind-bending puzzles are included in this brain-training collection. The mix of puzzles is designed to present a host of mental challenges and give your brain a great workout. As you progress through the book, the difficulty increases so you can test and build your skills as you go. Puzzle include domino placement, calcudokus, hidatos, number links, skyscrapers, slitherlinks and many more. Product Information: • ISBN: 9781398812758 • Author: Eric Saunders • Publisher: Arcturus • Format: Paperback • Pages: 192