Killer Sudoku and His Friends: Killer sudoku puzzles and Kakuro. : Easy levels. (Series #10) (Paperback) - Walmart.com
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Killer sudoku puzzles and Kakuro.: Medium levels.: 11 (Killer sudoku and his friends) : Holmes, Basford: Amazon.es: Libros
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Killer sudoku puzzles and Sukrokuro.: Easy levels.: 18 (Killer sudoku and his friends) : Holmes, Basford: Amazon.es: Libros