Geoffrey Simmons, MD, has authored seven novels, including The Z Papers, which sold 350,000 copies, and Pandemic, described by Publishers Weekly as “a hard lean thriller too fast to disbelieve.” His newest novel is Oppenheimer’s Demon, praised as “a riveting disaster thriller in which both the origin and end of man hang in the balance.” His nonfiction successes include What Darwin Didn’t Know and Billions of Missing Links. He holds a BS in biology from the University of Illinois, with coursework completed for an MS in microbiology, and an MD from the University of Illinois Medical School. A board-certified internist (1974–2016) and part-time hospitalist (1995–2016), he has been a Community Emergency Response Team (CERT) trainer, served on FEMA’s Regional Advisory Council (Region Ten), and is a former member of the Board of Governors of the American Academy of Disaster Medicine. A Fellow of Discovery Institute, he lives in Eugene, Oregon. Simmons has lectured on disaster preparedness on radio and TV as well as at many neighborhood associations and high schools. Additionally, he has been a medical correspondent for KABC in Los Angeles and KPNW in Eugene, and a guest on the Steve Allen show. He also has made numerous radio appearances related to his books and articles, and he had a radio show, Doc Talk, for seven years on Eugene’s KUGN.