Peter Alden, principal author of this series, is a birder, naturalist, author, and lecturer. He has led nature tours to more than 100 countries and is the author of books on North American, Latin American, and African wildlife. Peter organized an event called Biodiversity Day, the first of which took place in his hometown of Concord, Massachusetts. Peter Friederici, author of the habitats, conservation and ecology, and parks and preserves sections of this guide, is a writer and field biologist who contributes articles and essays to many national and regional periodicals. He lives in Flagstaff, Arizona.