Nature

Shoshone National Forest, Wyoming

Bird Guide Water Birds, Game Birds, and Birds of Prey

Hiking Westward

Whale Primer, with Special Attention to the California Gray Whale

Buster Bear's Twins

Snakes

Diversions of a Naturalist

The English Lakes

A Manual of Bird Study. A Description of Twenty-Five Local Birds with Study Options

Ocean Gardens

KAZAN (Including the Sequel – Baree, Son Of Kazan)

When the Wilderness Calls – Bertrand W. Sinclair Collection

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

Earth Features and Their Meaning An Introduction to Geology for the Student and the General Reader

Poisonous Snakes of Kansas

The Geology of D.A.R. State Park, Mt. Philo State Forest Park, Sand Bar State Park

The Incredible Travel Tales of John Muir (Illustrated Edition)

Everglades Wildguide

Texas Rocks and Minerals: An Amateur's Guide

Mammals of the Southwest Mountains and Mesas