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Owens, Colin C.

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500+ Extreme Puzzles Sudoku Book For Adults: A sudoku book with 500+ extremly difficult puzzles and solutions. Volume 1.
500+ Puzzles Sudoku Book For Adults: A sudoku book with a substantial 500+ puzzles and solutions including easy, medium and hard puzzles, volume 1.
1000+ Puzzles Sudoku Book For Adults: A huge sudoku book with 1000+ puzzles and solutions including easy, medium and hard puzzles, volume 1.
150 Puzzles Pocket Sudoku Book For Adults: A compact and tidy sudoku book with 150 puzzles and solutions including easy, medium and hard puzzles, volume 1.