Blue Skies, Green Hell, a thriller written by a bush pilot's wife, is a riveting tale set in the 1950s when pioneers of the sky flew single-engine aircraft over unforgiving wilderness and impenetrable jungle in Venezuela. Marilyn and Frank live in a place called the last frontier on the Orinoco River where he establishes a multiaircraft service that flies food, supplies and medicine to remote and inaccessible communities. Together they...