Hi.
I'm amazed no one has mentioned "Five Years in the Royal Flying Corps" by the great
James McCudden (some editions going by the re-title
Flying Fury, which McCudden would have hated). Certainly one of the most important, and best, memoirs of any WWI ace and a ripping good read.
Another personal favorite is "The Way of the Eagle" by Major
Charles Biddle (some editions entitled "Fighting Airman, the Way of the Eagle").
I always find myself going back to "Wings of War" (
Die Jagdstaffel unsere Heimat) by
Rudolf Stark, and
Ernst Udet's
Mein Fliegerleben, translated into English as "Ace of the Black Cross" or "Ace of the Iron Cross".
If it's fiction you want, how about "Winged Warfare", by
Billy Bishop?
Greg