bThe Ultimate Challenge Sudoku Puzzle BookbpppGrab this bmassive bonanzab of classic Sudoku grids of varying difficulty levels, expertly crafted and graded.ppThere are plenty of problems to enjoy in this jumbo compilation, with b2 different levels of difficultyb, which makes it bsuitable for intermediate and advanced sudoku playersb in love with this super addictive game pulli500 Medium puzzles for intermediate players or as a warm up for expertslili500 Hard problems which will give your brain a real challengeliulpbThis book with hundreds of hours of fun inside makes a great gift!bppWe've had your entertainment and convenience in mind when designing this book and thought about the small details which make a difference pullibWide center marginsb making it easier to work on the puzzles when you open or fold the bookliliThis also makes it beasy to tear out the pagesb if you want tolilibBigger font and better quality paper bthan newspapers and magazines - easy to read and write on without