Persecution of believers in Christ is already happening. Many of the details of "City on a Hill" are not Science Fiction but current events. One day soon the only refuge for the faithful may be space. Follow the founding of the once-godly Space Empire through its degeneration in "Sojourner," where a desperate couple fights loneliness and equipment malfunction to pioneer piloting a gas-collecting balloon ship to the outer planets. Their "rebellion" against the corrupt government opens the outer reaches of the Solar System to exploration.