Leo 25 Airborne - Pierre Closterman - a novel about flying Broussards over Algeria during the war
Tumult In The Clouds - 'Goody' Goodson - the story of the 4th Fighter Group in WWII
'The Bandy Papers' by Donald Jack - 3 hilarious novels about a WWI 'accidental' flying ace - not sure if they are still in print tho.