Dr. Susan Greenwood has a BA and PhD degrees in anthropology and teaches undergraduate courses on shamanism and altered states of consciousness at the University of Sussex, UK. She has written widely on magic, taking a critically sympathetic approach to issues of identity, gender, feminism, morality and the environment. She is the author of Magic, Witchcraft and the Otherworld (Berg, 2000), The Encyclopedia of Magic and Witchcraft (Lorenz, 2001), and The Nature of Magic: An Anthropology of Consciousness (Berg, 2005).