The North American O-47 is an American observation fixed-wing aircraft monoplane used by the United States Army Air Corps. Book describes in the great detail the development history and service history of this overlooked aircraft. Many unpublished photos, colour profiles and scale plans complete the story.

The Curtiss-Wright AT-9 was a twin-engined advanced trainer aircraft used by the United States during World War II to bridge the gap between single-engined trainers and twin-engined combat aircraft. It became known as the ""Jeep"" in the United States Army Air Force (USAAF).