Sailor York and the daring recruits of Explorer Academy uncover an elusive animal-smuggling ring in the first electrifying book in this new companion series. Soon after Cruz, Sailor, Emmett, and Lani return for their second year at Explorer Academy, their sense of calm is shattered when Sailor's older sister goes missing. Amidst incredible expeditions to far-flung destinations and competitive classes, Sailor bravely steps into the lead...