Steam and Glass (The Frost Chronicles)

Ann Mayor has spent her life in the shadows--the shadow of the the Frost, the shadow of her father, even the shadow of her best friend, Lia Weaver. Ann has never questioned that Lia is the brave one between them. After all, Lia lives outside the village, side by side with the wilderness, close enough to hear the Watchers scream at night. Ann lives under the careful watch of her devious father, surrounded by luxury. But then the cruel and mysterious Farthers from farther than the Frost invade, overtaking the village of Iceliss and bringing a mysterious agenda as they search the Frost for a device of power. With them comes a nobleman named Korr whose intents and loyalties remain inscrutable. Ann is drawn to him, for he has spent his life in the shadows too. She doesn't know if he is good or evil, but when she is arrested for treason, she's forced to trust him as she's taken from the Frost. As a political prisoner in Korr's hands, Ann is tested beyond what she ever imagined, and she realizes she has more bravery in her than she knew.