Flight of the Intruder by Stephen Coonts (Vietnam)
Battle of Britain by Len Deighton
The Bridges at Toko-ri by James Michener
No Highway by Nevil Shute - crash investigation novel
The Most Dangerous Game by Gavin Lyall - bush flying and espionage in Finland
Over to You: Ten Stories of Flyers and Flying by Roald Dahl - Dahl was a RAF flyer in WW2
Fighter Boys: The Battle of Britain, 1940 by Patrick Bishop
A Dawn Like Thunder: The True Story of Torpedo Squadron Eight by Robert J. Mrazek - Battle of Midway
Wing Leader by J.E.Johnson (RAF WW2 ace)
First Light by Geoffrey Wellum - one of the few to whom the many owe
No Moon Tonight by Don Charlwood - RAAF navigator in Bomber Command WW2
The Wild Blue: The Men and Boys Who Flew the B-24s Over Germany 1944-45 by Stephen Ambrose
With Wings Like Eagles by Michael Korda - Battle of Britain
Dauntless by Barrett Tillman - divebombers at Midway
Hellcats (sequel to Dauntless)
On Yankee Station by Barrett Tillman - naval aviation in Vietnam
The Aviators: Eddie Rickenbacker, Jimmy Doolittle, Charles Lindbergh, and the Epic Age of Flight by Winston Groom (author of Forrest Gump)
High Road to China by Jon Cleary - post WW1 flight from Europe to China - sort of aerial African Queen
Many of these are older books I read as pbooks; sorry, I'm not sure how many of these are available as ebooks.