Mason Stark has a problem with minding his own business. This worked to his advantage when he stole back his world from the alien Tremist. Now Mason is called upon to use that very curiosity as a spy at the Tremist school for soldiers. At least his best friend, Merrin, daughter of the Tremist king, is there to keep an eye on him. Masons bound to find trouble, but with the Tremist working on a secret weapon, trouble may come looking for him instead. In this stellar follow-up to The Planet Thieves, Dan Krokos imbues The Black Stars with all the tension and action that made his first middle-grade novel a gripping tale.