Ecology

Peter Parley's Wonders of the Earth, Sea, and Sky

Glacier National Park

Summer Birds From the Yucatan Peninsula, Mexico

The Book of Nature

The Geography of New Jersey

The Treasure of the Humble

The Land of Enchantment: From Pike's Peak to the Pacific

Shaggycoat

The Underworld of Oregon Caves National Monument

Island Trail at Walnut Canyon. Walnut Canyon National Monument

Carlsbad Caverns National Park, New Mexico

The Climate Change Hoax: The Global Warming Deception

The South Country

The Manatitlans or, A record of recent scientific explorations in the Andean La Plata, S. A

Wanderings in South America

Fresh Fields

Narrative of a Journey to the Summit of Mont Blanc

The Amateur Poacher

A Voyage of Discovery to the Southern Hemisphere

An Expedition to Explore the Interior of Western Australia