Mountains

The Geology of Mt. Mansfield State Forest

The Man-Eaters of Tsavo

Glaciers and Glaciation in Glacier National Park

The Geologic Story of Colorado National Monument

Creation of the Teton Landscape: The Geologic Story of Grand Teton National Park

Lassen Trails: A Brief Guide to the Trails of Lassen Volcanic National Park

Grand Teton: A Guide to Grand Teton National Park, Wyoming

Yellowstone and Grand Teton National Parks

Then and Now or, Thirty-Six Years in the Rockies

Carlsbad Caverns National Park, New Mexico

The Flying Machine Boys in the Wilds The Mystery of the Andes

Grit A-Plenty: A Tale of the Labrador Wild

Mount Rainier, a Record of Exploration

The Mountains of California (Illustrated Edition)

Alaska Days with John Muir: 4 Books in One Volume

Ungava Bob: A Winter's Tale

In the Catskills: Selections from the Writings of John Burroughs

Wolf and Coyote Trapping: An Up-to-Date Wolf Hunter's Guide