| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Kakuro for Beginners Red: Red Bk. 1 | 978-0-340-93100-4 (0-340-93100-0) | 2006 |
| Sudoku for Beginners 3: Bk. 3 | 978-0-340-91828-9 (0-340-91828-4) | 2005 |
| Sudoku for Beginners 4: Bk. 4 | 978-0-340-91829-6 (0-340-91829-2) | 2005 |