Steelstriker by Marie Lu is the sequel to Skyhunter (which I have not read). This story is told by Talin and Red who are trying to free their land that is ruled by the Premier Talen better obey the Premier because her mother's life depends on it.
I liked both Red and Talin, but it is Talin that really drives this book. Marie Lu's books are always good and this is no exception. (Gerard's review, 5++ stars)