Environmental Protection

Savage Surf Breaks

Arctic Wildlife Tours

Urban Heat Islands

Light and Shade

Soil Erosion Crisis

Jungle Survival Skills

Wild Foraging Mastery

Integrated Environmental Footprint Index (IPAI)

Runaway Planet

Wanderings in South America

Fresh Fields

The Spell of the Rockies

The Amateur Poacher

Underground Treasures: How and Where to Find Them

Burton Island State Park: Guide to the Interpretive Nature Trail and Hiking Trail

The Geology of Groton State Forest

The Migration of North American Birds

Krag and Johnny Bear

Wild Earth

The book of earth