- 500 Killer Sudoku Volume 20: Fill In Puzzles Book Killer Sudoku Logic 500 Easy To Hard Puzzles For Adults, Seniors And Killer Sudoku lovers Fresh, fun, and easy-to-read
- 500 Killer Sudoku Volume 31: Fill In Puzzles Book Killer Sudoku Logic 500 Easy To Hard Puzzles For Adults, Seniors And Killer Sudoku lovers Fresh,
- 500 Killer Sudoku Volume 14: Fill In Puzzles Book Killer Sudoku Logic 500 Easy To Hard Puzzles For Adults, Seniors And Killer Sudoku lovers Fresh,
- 500 Killer Sudoku Volume 13: Fill In Puzzles Book Killer Sudoku Logic 500 Easy To Hard Puzzles For Adults, Seniors And Killer Sudoku lovers Fresh,
- 500 Killer Sudoku Volume 33: Fill In Puzzles Book Killer Sudoku Logic 500 Easy To Hard Puzzles For Adults, Seniors And Killer Sudoku lovers Fresh,