Jews for Jesus is a small Hebrew Christian missionary group that grew out of the Jesus Movement in the early 1970s. The majority of the members are young Jewish adults who retain their ethnic identities despite their Christian commitments. This study describes and analyzes its social organization and membership. Data was gathered over a 22-month period from 1972 to 1974, using methods of participant observation and interviewing. In addition, intensive life histories of all members and a small sample of their parents' lives were collected, while interviews with the leader and key members in 1976 and 1986 provide an update on the organization and its constituents. Professor Lipson examines the origins of this movement, the basic or core beliefs, the moral code, recruitment techniques, leadership roles, the groups as a "family", rituals, social events and personal changes of individual converts in the group.