Just finished "Masters of the Air", Donald Miller. Traces the arc from the birth of aerial bombing, Billy Mitchell, to the formation and evolution of the USAAF 8th Air Force and ultimately the creation of the USAF.
Wide-ranging, factual and stuffed with great anecdotes. Many topics I knew little about such as the USAAF/RAF food drops on Holland, Manna/Chow Down, and especially the winter forced marches from Luftcamps in the east to escape the onrushing Soviets. Air force camps were unique .... high proportion of officers and flight sergeants.