Crosswind

Aeroplanes and intrigue...
It's been almost five hundred years since the collapse of the Great Commonwealth. The plagues left folk few and far between. City-states rule the continent of Galderica. There's coin to be had in trade—whether you take your wares by aeroplane or ride them over the rails.
Winchell Sark has a fine life as a reporter for the Perch Advocate newspaper, a good family at home and a faith that seems downright peculiar to most everyone else. So when he is called out to investigate a biplane crash at the foot of Perch, the finest center of aviation in the Sawtooth Mountains, he doesn't think much of it.
But there are dark powers at work—powers that have their eye on Perch. Powers that mankind long thought consigned to the trash heap of mythology. 'Cept they were wrong.
It's up to Winch and his brother, Copernicus, a hotshot pilot, to save their people—and it ain't going to be easy.