Lady-Protector: The Eighth Book of the Corean Chronicles

Though a bloody coup has made Mykella ruler of her land, it has left her and her two sisters bereft of family and uncertain of their friends. With no money and few allies, Mykella is faced with the difficult prospect of rebuilding her nation while trying to hold off a potentially devastating invasion. Resorting to a magical power within her, she is able to read the emotions of others and to spy on the movements of her enemies. But the resurgence of this power might herald the return of an ancient enemy, one that Mykella isn't sure how to face.