Crosswind

City-states rule the land, machines run by steam, and believers in the Savior contend with dark forces. When reporter Winchell Sark investigates a biplane crash at the foot of Perch, the finest center of aviation in the Sawtooth Mountains, he's drawn into a conspiracy that threatens to destroy his home. It's up to Winch and his brother Copernicus, a hotshot pilot, to save their people. And Thel knows, it ain't going to be easy.