Martha grew up in a haunted house in Rancho Santa Fe, California, near the site that would eventually house the Heaven's Gate cult. Inspired by her own real life psychic experiences, her novels have been published around the world. A former book editor for Simon & Schuster and Harcourt Brace Publishers, she frequently reviews books for The San Diego Union-Tribune and has made numerous television and radio appearances. She currently lives in Escondido, California.