Pocket Posh Sukendo 3 combines a pretty package with 100 Sukendo puzzles in multiple sizes and difficulty levels. Sukendo combines the logic of Sudoku with the interplay of math for a fast, fresh, and pleasurable solving experience. Pocket Posh Puzzle Books feature a beautiful, chic, complementary styled cover, making it a smart, sophisticated, and giftable accessory that goes with anything. It's perfect for puzzlers looking for a quick and engaging puzzle to complete and is a great way to exercise your mind-and look great while doing it!