Terence Palmer, PhD, is author of The Science of Spirit Possession. He is a member of the Society for Psychical Research as well as the Scientific and Medical Network. He is also a fellow of the Royal Society of Medicine.

Nancy Tramont assisted her husband, Dr. Charles V. Tramont, in his practice of past-life regression therapy and spirit-releasement therapy, for many years. She is author of Normal, Abnormal, or Paranormal? A Matter of Perspective.