Details: Sudoku thats easy to carry but tough to solve! If you like to do your puzzle-solving on the go, the portable Petite Hard Sudoku is the ticket. Sudoku master Frank Longo has crafted 106 mind-melting conundrums that all require upper-level solving techniques to conquer. So grab a pencil, or pen, if you dare!, & give your brain a workout. Ideal For: The conveniant size of this book makes it absolutely ideal for travel & on the go use.