When the earliest Christ-followers were baptized they participated in a politically subversive act. Rejecting the Empire's claim that it had a divine right to rule the world, they pledged their allegiance to a kingdom other than Rome and a king other than Caesar (Acts 17:7). Many books explore baptism from doctrinal or theological perspectives, and focus on issues such as the correct mode of baptism, the proper candidate for baptism, who has the authority...