Brian L. Weiss, M.D. is an American psychiatrist and author of several New York Times bestsellers, including Many Lives, Many Masters and Messages from the Masters. He is a pioneer in the field of past-life regression therapy and is a leading authority on the power of the mind to heal the body, relationships, and the spirit. He is a professor at the University of Miami School of Medicine and has been featured in numerous television programs, including Oprah and The Dr. Oz Show.