| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Case of the Monkeys That Fell from the Trees, The | 978-1-56397-902-6 (1-56397-902-0) | 2003 |
| The Case of the Monkeys That Fell from the Trees: And Other Mysteries in Tropical Nature | 978-1-59078-775-5 (1-59078-775-7) | 2010 |
| The Case of the Mummified Pigs, The: And Other Mysteries in Nature | 978-1-56397-783-1 (1-56397-783-4) | 1999 |