“Spirits in Stone – The Secrets of Megalithic America”
April 2018. Forward by Graham Hancock.
Glenn Kreisberg is a radio frequency engineer, writer, researcher, licensed outdoor guide, and the former editor of the Author of the Month page at GrahamHancock.com. He serves as a director-at-large for the New England Antiquities Research Association. The editor of Lost Knowledge of the Ancients and Mysteries of the Ancient Past, he is the co-founder of the Overlook Mountain Center in Woodstock, New York.