The Ultimate Challenge Sudoku Puzzle Bookp Grab this massive strongbargainstrong bonanza of classic Sudoku puzzles of varying difficulty levels, expertly crafted and graded.pp- 100 Medium puzzles for intermediate players or as a warm up for expertsppstrongThis book with hundreds of hours of fun inside makes a great gift!strongppWe've had your entertainment and convenience in mind when designing this book and thought about the small details which make a difference pp- strongWide center marginsstrong making it easier to work on the puzzles when you open or fold the bookpp- This also makes it strongeasy to tear out the pagesstrong if you want topp- strongBigger font and better quality paper strongthan newspapers and magazines - easy to read and write on without worry of bleed throughpp- Problem levels has been expertly assessed for strongconsistencystrongp