Nature

Egyptian Birds

In Beaver World

The Confessions of a Beachcomber

Native Flowers of New Zealand

The Meaning of the Russian Revolution

Winter

Himalayan Journals — Complete

The Wilderness Castaways

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

The Nakimu Caves, Glacier Dominion Park

Forest Trails to Wellness

British Bees An Introduction into the Studies of the Natural History and Economy of the Bees Indigenous to the British Isles

Pere Marquette State Park

In Northern Mists: The History of Arctic Exploration

Blooming Wonders

Deep Lake Mysteries

Environmental Impact

Deep Soil Ecology

Night Blooming Plants

Urban Life Challenges