| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| Hiccups For Elephant | 978-0-590-48588-3 | 1995 | James Preller |
| The Case of the Ghostwriter | 978-0-439-11429-5 | 2001 | Jamie Smith |
| The Case of the Runaway Dog | 978-0-439-11426-4 | 2001 | John Speirs |
| The Case of the Stinky Science Project | 978-0-439-11428-8 | 2001 | |