Black City, book 2: PhoenixElizabeth Richards2013

Ash Fisher believes his troubles are far behind him. He and Natalie are engaged and life seems good. But his happiness is short-lived when he receives a threatening visit from Purian Rose, who gives Ash an ultimatum: vote in favor of Rose’s Law—a law that will send Darklings and other dissenters to a deadly concentration camp, or Natalie will be killed. At first, the decision is clear, but can Ash really risk the lives of millions of Darklings to save the one he loves?