The Ultimate Challenge Sudoku Puzzle Book Grab this massive bargain bonanza of classic Sudoku puzzles of medium difficulty levels, expertly crafted and graded. 100 Medium puzzles for intermediate players or as a warm up for experts This book with hundreds of hours of fun inside makes a great gift! We've had your entertainment and convenience in mind when designing this book and thought about the small details which make a difference: Wide center margins making it easier to work on the puzzles when you open or fold the book This also makes it easy to tear out the pages if you want to Bigger font and better quality paper than newspapers and magazines - easy to read and write on without worry of bleed through Problem levels has been expertly assessed for consistency Grids are large and easy to see Great for exercising your mind and increasing cognitive ability Solutions included. An excellent gift for anyone who loves puzzles and activity book as well as challenging their mind!