Environmental Protection

Grand Teton [Wyoming] National Park

Woodland Tales

Wild Life Near Home

The Face of the Fields

With God in the Yellowstone

Forest Neighbors: Life Stories of Wild Animals

The Extermination of the American Bison

John Muir: The Story of My Boyhood and Youth & Letters to a Friend (Illustrated Edition)

Birds and Bees, Sharp Eyes, and Other Papers

The Wonders of the Jungle, Book One

Earth Science and Earth Structure

The Freewood Years

Secret Places Of West Cork Coast

The Secret Places Of The Shannon

A Scurry of Squirrels

Animals That Refused to Be Tamed Part-1

Stories of Rainforests Around the World

Stories of the Hidden Villages

Stories of the Hidden Villages

A Garden in the Hills