The Invisible Landscape: Mind, Hallucinogens and the I Ching , (with Dennis McKenna), Harper San Francisco. A revised and expanded edition of the the out of print 1975 title. Currently in print. ISBN # 0-06-250635-8

"The first work of cyberethnopharmacology" --Michael Horowitz, Director of the Fitz Hugh Ludlow Memorial Library

"One of the most mind boggling books I've ever read." --Jerry Garcia

"Put simply, Terence is a hoot." --Esquire