Killer sudoku and Kin-kon-kan extreme levels.: Puzzles Sudoku very difficult levels. (Paperback) | Village Books: Building Community One Book at a Time
Killer Sudoku and His Friends: Killer sudoku and Kin-kon-kan medium - hard levels. : Sudoku puzzles book to the road. (Series #7) (Paperback) - Walmart.com
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Killer sudoku and Kin-kon-kan easy levels. by Basford Holmes - 9781073557233 - Dymocks