Crop Circles: Exploring the Designs & Mysteries
Secrets in the Fields: The Science and Mysticism of Crop Circles
Crop Circles Revealed: Language of the Light Symbols
Opening Minds: A Journey of Extraordinary Encounters, Crop Circles, and Resonance
The Deepening Complexity of Crop Circles: Scientific Research and Urban Legends
Crop Circles: Signs of Contact
Crop Circles, Gods and Their Secrets: History of Mankind, Written in the Grain
Vital Signs: A Complete Guide to the Crop Circle Mystery and Why It Is Not a Hoax
Crop Circles: Evidence of a Cover-Up (An Orbis Enigma Book)
Crop Circle Cards, The Living Oracle