Gary E. Schwartz, Ph.D., is a professor of psychology, medicine, neurology, psychiatry, and surgery at the University of Arizona and director of its Laboratory for Advances in Consciousness and Health. After receiving his doctorate from Harvard University, he served as professor of psychology and psychiatry at Yale University, director of the Yale Psychophysiology Center, and co-director of the Yale Behavioral Medicine Clinic, before moving to Arizona in 1988. He has published more than four hundred scientific papers and coedited eleven academic books. He is the author of The Afterlife Experiments and The Truth About Medium and coauthor of The Living Energy Universe. William L. Simon is a screen and television writer and bestselling author.