Galileo's Ascension - The New Dark Ages, #3

Thrown once again into the wild, Ellia is alone. She has betrayed those who trusted her so she can face her mother and stop the Church's terrible war tearing apart the countryside. She knows she's walking into a trap, but she can't sit by and watch the world burn. Kieva, sworn to protect Ellia, is trapped underground, forced to deal with the wrath of Seth, the mad leader of the Order, a group fighting against the Church.
Wracked with guilt that he cannot perform his duty, he loses hope until Lorensa, a woman who remembers what the Order once stood for, gives him new purpose. Save the world. Ellia and Kieva must fight for what they believe in or at least die trying. Galileo's Ascension is the final book in the New Dark Ages Trilogy.