The Church of Bible Understanding (COBU) had a presence in many cities in the United States during the late seventies and eighties. It was well known in New York City for its Christian Brothers Carpet Cleaning business, which was such a regular part of the fabric of city life that it was parodied (as Sunshine Carpet Cleaners) on an episode of Seinfeld. Its 39.95 Carpet Cleaning Special flyers were slipped under many doors and left in many apartment lobbies. Unlike other religious organizations whose zealous devotees stood on corners selling flowers, the COBU brothers and sisters gave live...