Boundary by Heather Terrell

Eva is the first Maiden in Aerie history to train as Archon, the sacred leader of New North. All eyes are watching. Although she is betrothed to Jasper, she still finds herself drawn to Lukas, a Boundary dweller and former servant who may know who killed her twin brother.

Eva's relationship with Lukas is forbidden. And his conviction that she is the Angakkuq, a mystical figure destined to destroy the Aerie, is even more dangerous. On her very first Archon expedition, she uncovers the Genesis, the legendary ship that brought the Founders to the New North. Its contents shatter the world Eva has known. Now she may be the only one--as both Archon and Angakkuq--who can prevent a war that will destroy what is left of human civilization.

From the Hardcover edition.