Empyrion, book 2 : The Siege of Dome
Stephen R. Lawhead1986

How resilient is the human spirit in the face of merciless oppression? What values in life stand up to certain death?

In the second and concluding Empyrion book, Orion Treet determines to return to Dome after his brief respite among the peaceable, graceful Fieri. No one but Orion and a handful of rebels seriously believes that Dome will carry out its threat to annihilate Fierra. Abandoned by his companions from Earth, Treet becomes a solitary figure in a deadly civil war.