Quint, the teenage son of a sky pirate, is apprenticed to Maris's father, Linius Pallitax, the High Academe of the floating city of Sanctaphrax. During the day, Quint endures tedious studies, but at night, he is sent on mysterious errands. As his master becomes increasingly distraught and distant, Quint realizes that the man is involved in something terrible that may put Sanctaphrax at risk. Prequel to the Edge chronicle trilogy. Grade . . . Read by Ann Saunders.