First published in 1939, it's a straightforward adventure story of Barry Martin, a rookie pilot who gets hired on by an airplane manufacturer as a test pilot. Barry is a great flyer but his main challenge is finding a way to fit in with the other two pilots who regard him as an unnecessary addition to the team. Barry has many flying adventures in this novel, as he earns his place, but he also encounters some intrigue in the form of industrial espionage from rival manufacturers. His loyalty is tested as are his courage and flying skills.
Lots of fun to be had here. Today's book market would probably classify this as YA even though Barry is in his 20s. But I can certainly appreciate the more innocent age in which it was written. I'm very happy to have rescued this one from whatever fate awaited.