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Looking for Extreme Sudoku? Then you should try what this book has to offer. These 200 puzzles will be tough. They will keep you busy solving for hours upon hours. If you love extreme, you will love these sudoku puzzles! There are two puzzles on a page and There's lots of room for extra markings. Solutions to puzzles INCLUDED...Just in case you get stuck...Not sure if it's hard enough? Just look inside the book and you'll see. Perfect gift for anyone who likes hard or extremely hard Sudoku.---Just in case you also need other Sudoku puzzles to solve, you'll be happy to know that we offer Sudoku puzzles ranging from very easy to extremely hard levels. See our PuzzleProof author page for amazing Sudoku for all skill levels.