Encyclopedia of Crystals, Revised and Expanded

Turning to Stone: Discovering the Subtle Wisdom of Rocks

Rocks & Minerals of Washington and Oregon: A Field Guide to the Evergreen and Beaver States (Rocks & Minerals Identification Guides)

Rockhounding: A Beginner’s Guide to Rock Hunting Around Lake Michigan

National Audubon Society Field Guide to Insects and Spiders: North America (National Audubon Society Field Guides)

Rockhounding Oregon: A Guide to the State's Best Rockhounding Sites (Rockhounding Series)

The Minerals Encyclopedia: 700 Minerals, Gems and Rocks

Rockhounding Utah: A Guide To The State's Best Rockhounding Sites (Rockhounding Series)

Collecting Rocks, Gems and Minerals: Identification, Values and Lapidary Uses

Lake Superior Agates Field Guide (Rocks & Minerals Identification Guides)