The Soul Thief — Cecelia Holland

  A Viking raid leads a young man on a quest to save his sister in this “potent blend of fantasy, history, and romance . . . Rich with Nordic lore” (Publishers Weekly).
 
Though Corban and Mav are twins, they could not be more different in the eyes of their father, the lord of an Irish coastal farmstead. While Mav has the Second Sight and is her father's favorite, Corban is a deep disappointment. Exiled for refusing to take up his sword in the name of the High King, he is long gone when Viking dragon ships bring slaughter to his people and fire to his home.

Now Corban must embark on an epic quest to save his sister from slavery. From the far coast of Ireland to the occupied village of Dublin, and across the sea to the Kingdom of the Danes, Corban is drawn to the trail of his sister, fighting for his life and striving to earn the influence and money he will need to buy her freedom.