Killer Sudoku And Kin-kon-kan Easy - Medium Levels. : Basfo | MercadoLibre
1,000 + Big killer sudoku 6x6: Logic puzzles hard levels (Paperback) | Changing Hands Bookstore
Killer sudoku and Kin-kon-kan medium levels.: Sudoku puzzles mid-level book. (Paperback) de Basford Holmes: New Paperback (2019) | The Book Depository
Printable Puzzles by KrazyDad
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