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World Puzzle Numple Best Selection Vol. 2128 page 4.25x6.75 inch book containing 100 Classic Sudoku and Irregular Sudoku puzzles in medium to very hard difficulty levels. 
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World Puzzle Numple Best Selection Vol. 2128 page 4.25x6.75 inch book containing 100 Classic Sudoku and Irregular Sudoku puzzles in medium to very hard difficulty levels.
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