Robert E. Bartholomew is the author of fourteen previous books, most recently A Colorful History of Popular Delusions (with Peter Hassall) and American Hauntings (with Joe Nickell). He has also published more than sixty articles in professional journals, including the British Medical Journal and the International Journal of Social Psychiatry. Bartholomew has been interviewed in the New York Times, Smithsonian Magazine, USA Today, the Wall Street Journal, and on the History and Discovery channels. He is featured in an eight-part National Geographic series on UFOs. Bartholomew holds a PhD in medical sociology. He is a history instructor at Botany College, in Auckland, New Zealand.Anja Reumschüssel is a freelance science journalist living in Hamburg, Germany. Her articles have been published in various German science and general-interest magazines, including GEO, National Geographic, and STERN. She recently published her book, Extremismus, about political and religious extremism in Germany.