“Sabotage in the Sky” by L. Ron Hubbard
Publication date: August 1940
Original publication: Five-Novels Monthly
Genre: Military & War
Story description: Bill Trevillian and Kip Lee are rival ace test pilots, whose very fiery relationship is about to hit boiling point when a deadly saboteur is added to the mix.
Currently available as part of the Stories from the Golden Age series, in the book Sabotage in the Sky.