An expert in new religions, Professor James Lewis has here brought together twenty insightful articles that cover the many variations of UFO-based religions. What the contributors demonstrate is that there are persistent and salient themes underlying the diversity of beliefs centred on the UFO phenomenon. Hearkening back to theosophy, many groups have interpreted UFO sightings and alleged contacts as attempts by alien ambassadors from a more advanced civilization to bring spiritual enlightenment to Earth, where humanity is seen to be floundering in ignorance. The extraterrestrial message is usually channelled through a charismatic human leader, who then mobilises a group around this New Age ‘revelation’.