The Ultimate Travel Format Sudoku Puzzle BookThis book has a smaller size than most Sudoku books and is ideal for carrying with you in your bag or backpack when you are on the go.It contains a collection of 200 classic Sudoku problems, expertly designed and graded: 100 Medium and 100 Hard puzzles. That makes it suitable for all addicts of this brain-bashing game, kids and adults alike.We've had your entertainment and convenience in mind when designing this book and thought about the small details which make a difference: Wider center margins making it easier to work on the puzzles when you fold the bookLarger font and better quality paper than newspapers and magazines - easy to write on without worry of bleed throughProblem levels has been expertly assessed for consistency. No wasted puzzle in this book.2 problems per page and solutions at the end of the bookThis book with hours of fun inside also makes a great gift!