| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Counting and Alphabet Songs | 978-1-84032-045-9 (1-84032-045-1) | 1998 | Hodder Children's Books |
| Sudoku for Beginners 1: Bk. 1 | 978-0-340-91721-3 (0-340-91721-0) | 2005 | " |
| Sudoku for Beginners: Bk. 2 | 978-0-340-91722-0 (0-340-91722-9) | 2005 | " |