Herbert A. Johnson. Wingless Eagle: U.S. Army Aviation through World War I. Chapel Hill and London: University of North Carolina Press, 2001. Looks at not just the actual flying stuff (the first flights, the expedition against Pancho Villa, the expansion for war) but the media portrayal of such (e.g. chapter 2, 'Army aviation in the media fishbowl'). So I think it will be very much to my taste; not bad for a bargain table find!
Helen M. Kinsella. The Image before the Weapon: A Critical History of the Distinction between Combatant and Civilian. Ithaca and London, Cornell University Press, 2011. As the title suggests it's not really the sort of book you turn to for who said (or did) what to whom and why; it's also written by a political scientist, not a historian, but we'll let that pass. Starts with medieval codes of warfare but mostly concentrates on the 20th century, especially the 1949 IV Geneva Convention and the 1977 Protocol to it.
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