The Chains of Heaven: An Ethiopian Romance

Rocks, Gems, and Minerals

The Barefoot Emperor: An Ethiopian Tragedy

Rocks and Minerals

Rising Ground: A Search for the Spirit of Place

Field Guide to Rocks & Minerals of Southern Africa

The Spirit-Wrestlers (Text Only)

Dirt: The Ecstatic Skin of the Earth

The Levelling Sea: The Story of a Cornish Haven in the Age of Sail

Handy Pocket Guide to Asian Gemstones

The Bronski House (Text Only)

Blue: The Science and Secrets of Nature's Rarest Color

The Main Cages

Rockhounding Idaho: A Guide to 99 of the State’s Best Rockhounding Sites

Summer Isles: A Voyage of the Imagination

Modern Rockhounding and Prospecting Handbook

Ancient Gems and Finger Rings: Catalogue of the Collection

Crystals, Rocks, and Gemstones: Exploring Earth's Treasures

The Science of the Earth: The Secrets of Our Planet Revealed

Boom, Bust, Boom: A Story About Copper, the Metal that Runs the World