Environmental Protection

The White Heart of Mojave: An Adventure with the Outdoors of the Desert

Ancient Lake Mysteries

Earthquake Survival

A Thousand-Mile Walk to the Gulf (With Original Drawings & Photographs)

The Gospel According to the Earth

Mississippi River Tragedies

Fresh Fields

The Amateur Poacher

The Antarctic Book of Cooking and Cleaning

Sanctuary: A Bird Masque

By the Marshes of Minas

3000 Miles in the Great Smokies

Wild Animals of North America

Literary Pilgrimages of a Naturalist

Tinicum & Eastwick

The Land of Little Rain

Wild Life at the Land's End

A Pictorial Guide to Mesa Verde National Park

The Wilderness Castaways

The Strangest Things in the World: A Book About Extraordinary Manifestations of Nature