Wetlands (Audubon Society Nature Guides)
Eastern Forests (Audubon Society Nature Guides)
Deserts (Audubon Society Nature Guides)
National Audubon Society Regional Guide to Atlantic and Gulf Coast: A Personal Journey (Audubon Society Nature Guides)
Grasses: An Identification Guide (Sponsored by the Roger Tory Peterson Institute)
The Deserts of the Southwest: A Sierra Club Naturalist's Guide (Sierra Club Naturalist's Guides)