J. M. Kenworthy. Peace or War? New York: Boni & Liveright, 1927. I ordered this back in January, before I realised that it's just Will Civilisation Crash? (London: Ernest Benn, 1927), under a different title. And a different pagination. Oh well.

David Zimmerman. Britain's Shield: Radar and the Defeat of the Luftwaffe. Stroud: Sutton, 2001. A (the?) standard reference on the invention of radar. Has some details on a couple of unjustly neglected high technologies of the interwar period -- sound location and death rays.

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