C. K. · C L · Cheryl Kirk
| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| Bearly Solvable Sudokus | 978-0-9721764-9-1 | 2007 | Kathy Sarns |
| Big Book of 620 Sudoku Puzzles for the Frustrated Fanatic | 978-0-9721764-2-2 | 2006 | |
| Killer Sudoku! | 978-0-9721764-7-7 | 2007 | Noriko Senshu |
| Midnight Sun Sudoku | 978-0-9721764-1-5 | 2007 | " |