A short adventure novel set in the Amazon/Brazil in the 1930's-early 40's era. The main characters are involved in a flying business, ferrying mail & cargo. People who populate the outposts at the edge of civilization fill out the cast of players. Fatal skirmishes between the native population (Huna) and traders lead up to a massacre at a mission. That event introduces 2 female characters who are looking for two nuns who may have been captured. They cause tension, and ultimately are the impetus for final action at the micro & macro level of the story to culminate.
What do You think about The Last Place God Made (1985)?