Ecology

Snakes

The Underworld of Oregon Caves National Monument

Creation of the Teton Landscape: The Geologic Story of Grand Teton National Park

A to Z Beekeeping for Total Beginners

Langstroth on the Hive and the Honey-Bee: A Bee Keeper's Manual

Ocean Gardens

Curious by Nature

Barle's Story

Wild Harvest

Browsing Nature?s Aisles

The Face of the Fields

Queen of the Sun

The Memory We Could Be

On Cambrian and Cumbrian Hills: Pilgrimages to Snowdon and Scafell

The Wild Garden Or Our Groves and Gardens Made Beautiful by the Naturalisation of Hardy Exotic Plants; Being One Way Onwards from the Dark Ages

The Manual of the Botany of the Northern United States

Walking essays

The Story of the Hills: A Book About Mountains for General Readers

Wild Spain (España agreste)

Trees of Indiana First Revised Edition (Publication No. 13, Department of Conservation, State of Indiana)