Ecosystems & Habitats

Spinel Formation

A Canyon Voyage

Plain Tales of the North

The Wolf Hunters: A Tale of Adventure in the Wilderness

Basin Formation

The Romance of the Woods

Glaucus; Or, The Wonders of the Shore

Children of the Frost

Cave System Secrets

Canyons of America

Coldest Places

Tundra Facts

Highest Cliffs

My First Summer in the Sierra (With Original Drawings & Photographs)

In Northern Mists: The History of Arctic Exploration

Earth Features and Their Meaning An Introduction to Geology for the Student and the General Reader

Ocean Gardens

A voyage to Spitzbergen

Mammals of the Southwest Mountains and Mesas

Hiking Westward