Nenah Sylver, PhD is a writer, educator, and social change advocate. Her seminal works are The Holistic Handbook of Sauna Therapy and The Rife Handbook of Frequency Therapy, with a Holistic Health Primer (release date: spring 2009), which one Rife researcher calls "the bible of holistic medicine for the 21st century." The first edition sold in over 30 countries. Completely revised and expanded, the new version is the most comprehensive and versatile manual available on holistic health and the theory and practice of frequency healing, suitable for laypersons and professionals.