The Wrong Stuff, by Smith (personal tale of life as a B-17 pilot in 8th AF)
The Few, by Kershaw (The first Americans in the Battle of Britain)
Masters of the Air, by Miller (8th AF, stories from strategic to tactical, awesome)
Unbroken, by Hillenbrand (B-24 crewman, incredible tale of survival)
Fighter Pilot, by Olds (autobiography of Robin Olds)
JG26: Top Guns of the Luftwaffe, by Caldwell (daily history of JG 26)
The First and the Last, by Galland (Galland's tale)
Zemke's Wolfpack, by Freeman (P-47's, Zemke, Johnson, Gabreski)
Top Guns, by Foss and Brennan (excellent collection from pilots)
Samurai, by Sakai (Saburo Sakai's story)
Midway, by Fuchida and Okumiya (Midway and a lot more by guys who were in the action)
Intrepid, by White and Gandt (detailed stories of USS Intrepid)
FLAK, by Veitch (stories from RAF, RAAF, RNZAF pilots)
Baa, Baa Black Sheep, by Boyington (Pappy's tales)
Aces High, by Yenne (about Bong and McGuire)
A Dawn Like Thunder, by Mrazek (detailed stories of VT-8)
America's Hundred Thousand, by Dean (nonfiction detailed info on all US WWII fighters)
The Lockheed P-38 Lightning, by Bodie (awesome nonfiction book on the P-38)
The Wild Blue, by Ambrose (B-24 stories)
Flying Through Midnight, by Halliday (interesting tales of a C-123 special-ops pilot -- this one is not WWII, though)