Palgrave Macmillan · Walker Books
| title | media type | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|---|
| From Caves to Capitalism | Hardcover | 978-0-333-77504-2 (0-333-77504-X) | 2009 |
| From Caves to Capitalism | Paperback | 978-0-333-77505-9 (0-333-77505-8) | 2009 |
| Seababy: A Little Otter Returns Home | Hardcover | 978-0-8027-9808-4 (0-8027-9808-X) | 2012 |