Back Pocket (t) Sudoku features a stylish cover making it a smart-looking package that also challenges. Packaged in a handy size Back Pocket (t) Sudoku easily fits into a pocket brief case or laptop bag. Back Pocket (t) Sudoku contains 100 addictive Sudoku puzzles & is perfect for puzzlers looking for a quick & engaging puzzle to complete. With more than 3 million copies in print the Pocket Posh (r) puzzle series is a great way to exercise your mind-and look smart while doing it!