| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| Bears | 978-0-8117-3251-2 | 2005 | Charles Fergus |
| Book of Field & Roadside: Open-Country Weeds, Trees, and Wildflowers of Eastern North America | 978-0-8117-2625-2 | 2003 | John Eastman |
| Dragonflies | 978-0-8117-2971-0 | 2004 | Cynthia Berger |
| Wildlife of Pennsylvania: and the Northeast | 978-0-8117-2899-7 | 2000 | Charles Fergus |