Nicholas Booth. Lucifer Rising: British Intelligence and the Occult in the Second World War. Stroud: History Press, 2016. The intersection of two potentially very dodgy topics, black magic and black propaganda; but I'm reassured by the author's statement that he doesn't believe in the occult (not sure where he stands on British intelligence...) and fairly extensive use of The National Archives. Everybody from Dennis Wheatley to Rudolf Hess is here; Aleister Crowley is listed in the index under his own name and as 'The Beast'!
William J. Fanning, Jr. Death Rays and the Popular Media, 1876-1939: A Study of Directed Energy Weapons in Fact, Fiction and Film. Jefferson: McFarland and Company, 2015. Does what it says on the tin (as they say): provides a thorough, if not exhaustive, study of deaths rays in (mostly) British, American and Australian (go Trove!) newspapers, novels and films -- including claims of actual death rays. After the mid-1920s and popularisation by Grindell-Mathews and stories of French aircraft mysteriously losing power over Germany, the idea became so widely recognisable that it was used in contexts far removed from speculative literature.
Peter Gray. Air Warfare: History, Theory and Practice. London and New York: Bloomsbury Academic, 2016. Relatively short but very well-referenced. Looks like it would be an excellent postgrad-level textbook (which is exactly what it was designed for).
Alistair Horne. Hubris: The Tragedy of War in the Twentieth Century. London: Weidenfeld & Nicolson, 2016. Horne's first book was published more than 60 years ago (!) but this is the first I've read. An engaging account of some key battles (Tsushima, Nomonhan, Moscow, Midway, Inchon and Dien Bien Phu), loosely connected by the knock-on effects of one battle on the next, and the theme of hubris.
Robert H. Kargon, Karen Fiss, Morris Low and Arthur P. Molella. World's Fairs on the Eve of War: Science, Technology, and Modernity 1937-1942. Pittsburgh: University of Pittsburgh Press, 2015. I think I ordered this because of the whole aerial theatre/technology as spectacle thing, but I'm not sure. Takes in Paris, Düsseldorf, New York, Tokyo (cancelled) and Rome (cancelled). Well-illustrated for an academic monograph.
Bernard Lowry. Pillboxes and Tank Traps. Oxford and New York: Shire Publications, 2014. A small book with lots of photos of British fortifications from the Second World War. Nicely produced but obviously just skims the surface.
Glen O'Hara. Britain and the Sea since 1600. Basingstoke: Palgrave Macmillan, 2010. A synthesis which combines a thematic (trade, migration, war, etc) and chronological approach very well. Made me think about what a Britain and the Air since 1900 might look like...
Francis Spufford. Red Plenty. London: Faber and Faber, 2011. Everybody but me has read this so it's probably time I caught up.