- National Geographic Guide to Medicinal Herbs: The World's Most Effective Healing Plants
- A Walk in the Deciduous Forest (Johnson, Rebecca L. Biomes of North America.)
- Desk Reference to Nature's Medicine
- A Walk in the Tundra (Biomes of North America)
- A Walk in the Desert (Johnson, Rebecca L. Biomes of North America.)
- Heather Lehr Wagner
- Gary Jeffrey
- Philip Johansson
- David Shirley
- Ralph Golan
- Grolier Educational
- Matthew Hagee
- Tieraona Low Dog
- Mary Varilla
- Patricia Elliott
- Jonathan Dixon
- Jane Billinghurst
- David Kiefer
- Jeff Burlingame
- Missy Horsfall
- Elizabeth Kaplan
- William Goodwin
- Troy Thorne
- Alex Stewart
- Emberley