David Luke, Ph.D., is an associate professor of psychology at the University of Greenwich and an honorary senior lecturer at the Imperial College London. He has published over 100 academic papers on transpersonal experiences and altered states of consciousness and regularly gives public lectures and conference presentations. A cofounder and director of Breaking Convention, a biennial international conference on psychedelic research, he lives in East Sussex, England. Rory Spowers is an ecological writer and filmmaker, most recently working with BBC presenter Bruce Parry on the film Tawai. He is the founder of the Web of Hope, a UK charity and ecological education resource, and the creative director for the Tyringham Initiative. He lives in Ibiza, Spain.