Environmental Protection

Aquatic Farming

Earth's Mass Extinctions

Rise of Bamboo

Green Energy Shift

Vertical Farming

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

Sinkhole Zone Risks

Urban Water Management

Birds of Britain

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

Shoshone National Forest, Wyoming

Whale Primer, with Special Attention to the California Gray Whale

Buster Bear's Twins

The English Lakes

A Thousand-Mile Walk to the Gulf (With Original Drawings & Photographs)