| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Blackstone and the Balloon of Death | 978-0-7278-7687-4 (0-7278-7687-2) | 2008 | Sally Spencer |
| Blackstone and the Golden Egg | 978-0-7278-6161-0 (0-7278-6161-1) | 2004 | |
| Blackstone and the Tiger | 978-0-7278-7393-4 (0-7278-7393-8) | 2004 | |