Hazel Denning studied under eminent scholars in extension courses and workshops, eventually entering the university and earning two Master's degrees and a Ph.D. in Clinical Psychology. She also earned a doctorate in metaphysical counseling. For thirty-seven years she has had a full-time career as a Past-Life Regression Therapist.

The author has appeared on numerous TV programs, been interviewed by Oprah Winfrey and Tom Snyder, and lectured in Japan, England, Holland, India, Brazil, and the United States. She is currently an instructor with the Professional Institute for Regression therapy.