Daniel Ogden is Professor of Ancient History at the University of Exeter. His previous books include The Werewolf in the Ancient World; Drakon: Dragon Myth and Serpent Cult in the Greek and Roman Worlds; Dragons, Serpents, and Slayers in the Classical and Early Christian Worlds: A Sourcebook ; and Magic, Witchcraft, and Ghosts in the Greek and Roman Worlds: A Sourcebook.