A selection of my military-history favorites, in several categories.
Aviation
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The Few, by Kershaw
Masters of the Air, by Miller
Top Guns, by Foss and Brennan
A Dawn Like Thunder, by Mrazek
JG26: Top Guns of the Luftwaffe, by Caldwell
Zemke's Wolf Pack (but not sure which one -- by Freeman or Hess? Have to check my library.)
ZERO! THE STORY OF JAPAN'S AIR WAR IN THE PACIFIC, by Okumiya and Horikoshi
Fly, by Veitch
Flying Through Midnight, by Halliday
Naval Warfare
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Last Stand of the Tin Can Sailors, by Hornfischer
The Bravest Man, by Tuohy
Neptune's Inferno, by Hornfischer
A Measureless Peril, by Snow
Blind Man's Bluff, by Sontag, Drew, and Drew
Land Warfare
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With the Old Breed, by Sledge
Band of Brothers, by Ambrose
One Man's War, by LaMore
To Hell and Back, by Murphy
No Simple Victory, by Davies