Gibbs Smith

Steep Trails - John Muir

Wild Animals I Have Known - Ernest Thompson Seton

Wilderness Essays - John Muir

Our National Parks - John Muir

Canoeing In The Wilderness - Henry David Thoreau

Natural History Essays - Henry David Thoreau

Walden: Life in the Woods - Henry David Thoreau

The Call of the Wild - Jack London

Roughing It - Mark Twain