The next installment in the popular Jumbo Sudoku series, Jumbo Sudoku Harder Than Ever includes over 300 puzzles. The popular numerical brainteaser is a fun way to work your brain, and sudoku fans of all levels will love this collection. Jumbo Sudoku Harder Than Ever includes classic sudoku as well as-Samurai, Kakuro, Killer, Battleship and "Son of Sudoku" Futoshiki puzzles. All the puzzles are rated on a scale of tricky to fiendish. If you are looking...
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