The perfect gift for any sudoku puzzle master The author of Sudoku Genius returns with 144 challenging new puzzles and a master class in the very most advanced and elegant solving methods. The logical beauty of Sudoku is laid bare in clear, easy-to-follow lessons that will take you down routes of thought that you might not have encountered before, including: - Swordfish - X-Wing - Double Channeling - Uniqueness Start with a Sudoku 101 refresher course...