Oracle's Child — Sandra C. Stixrude

Determined to kill his father for his crimes against humanity, Pelinas resolves to live until the Duke of Korval is dead. Beyond a burning desire for revenge, though, he has no solid plan to accomplish what seems impossible. Duke Per leads a massive army, controls frightening technology, and even commands the dead.

But the Duke of Korval has eleven other sons, many carrying their own dark secrets. When Telluris Marat reveals strange and terrible facts about Pelinas's heritage and his birth, new possibilities unfold. He might attain all he desires -- but will the cost be too high for him, for his friends, and for the entire continent?