The popular numerical brainteaser is a fun way to work the brain, and Sudoku fans of all levels will love this collection. "Jumbo Sudoku Brain Buster Edition" includes classic Sudoku as well as Samurai, Kakuro, Killer, "Son of Sudoku", Futoshiki, and "0" Sum puzzles. All the puzzles are rated on a scale of tricky to fiendish. For readers looking to finally be challenged by Sudoku, this is the book. Sudoku puzzles continue to run in top newspapers and magazines across the country. Because every puzzle is completely different, Sudoku appeals to puzzle fans of all ages.