Sibley, David Allen, The Sibley Guide to Birds, Knopf, 2000.
This reference guide, used by Roy Eberhardt and his father in Hoot, is considered one of the premier field guides available for American bird enthusiasts. It features thousands of illustrations to help birdwatchers identify over eight hundred species of birds found in North America.
Salmansohn, Pete, and Stephen W. Kress, Saving Birds: Heroes Around the World, Tilbury House Publishers, 2005.
This slim volume, produced with the blessings of the Audubon Society, introduces readers to six endangered bird species from around the world......
