12 books
National Audubon Society Book of Wild Birds
National Audubon Society Book of Wild Animals
Audubon Nature Yearbook, 1991
Audubon Nature Yearbook 87
Audubon Book of Water Birds
The Audubon Society Book of Wild Cats
The Audubon Society Book of Insects
The Audubon Society Book of Trees
The Audubon Society Book of Marine Wildlife
The Audubon Society Book of the Wildflowers of the World
The Audubon Society Book of Wild Animals
Audubon Society Book of Wild Birds