"For almost twenty years this book has served as a guide to those movements on the verge of, but not quite within 'mainstream Christianity', providing information about the origins and practices of a variety of sects, and adding assessments of their merits and weaknesses. Regular revisions have kept the material up to date, and this new edition indicated the situation at the beginning of the 1970s. Groups discussed are: the Jesus Freaks, the Seventh-Day Adventists, Christian Science, the Mormons, Jehovah's Witnesses, Spiritualism, British-Israel, Moral Re-Armament, Theosophy and Scientology. The chapters on the Jesus Freaks and Scientology are completely new; many of the other chapters have been re-written and updated."-Publisher.