Ecosystems & Habitats

The Falls of Niagara and Other Famous Cataracts

Trails and Tramps in Alaska and Newfoundland

Starved Rock

Plain Tales of the North

White Mountain Trails

Our National Forests

Ferns of Hawaii National Park

Lassen Trails: A Brief Guide to the Trails of Lassen Volcanic National Park

The Barren Ground of Northern Canada

In the Wilderness

The Wolf Hunters: A Tale of Adventure in the Wilderness

Forest Trees and Forest Scenery

Fungus Fundamentals

Chia Seeds, Ancient Superfood for Modern Health

Wildebeest Realm, The Great Migrators

How to Build a Natural Pond

A Week on the Concord and Merrimack Rivers

The Arctic Prairies : a Canoe-Journey of 2,000 Miles in Search of the Caribou

Grit A-Plenty: A Tale of the Labrador Wild

My First Summer in the Sierra (Illustrated Edition)