As someone who has a deep-set fascination with early aviation/First World War aviation, I loved this book. It's focused on 2 brothers, who were among the U.S. Army's first aviators. Both were trained at Mineola Field on Long Island and won their wings in the summer of 1917. Then both brothers were sent to the Midwest as flight instructors to train other pilots. At that time, the U.S. was scrambling desperately to build an air force that could be comparable to their European counterparts.
George Hughes (the oldest brother) was posted to France before the end of 1917 and later served in combat over the Western Front with an observation squadron. Subsequently, George was promoted to Captain and given command of his own squadron.
Gerard, the youngest brother, spent most of 1918 in Texas as a flight instructor. Eventually, he got to France but arrived there too late to see action. Both he and his brother later returned to the U.S. together in 1919. Subsequently, they were discharged from the Army and went into business together for many years.
Both brothers, as officers, had the opportunity to rub elbows with some of the senior officers and famous aviators (e.g. Billy Mitchell, the commander of the Air Service; Eddie Rickenbacker, the top U.S. ace of the war; and Quentin Roosevelt, Teddy Roosevelt's youngest son who became a fighter pilot in France) in the U.S. Army Air Service.
Gerard (who lived to be 101, passing away in 1996; he and the author worked very closely in the creation of this book) also provides some very eye-opening and fascinating commentary about the nature of aviation and a pilot's life & training during that era.