Robert Boyce. The Great Interwar Crisis and the Collapse of Globalization. Basingstoke and New York: Palgrave Macmillan, 2009. A big new (well, not so new by now) history of the way the Great Depression (or Slump) wrecked the international order, paving the way for Hitler and the rest of it. So it's not just about failures in economics and politics, but in internationalism and disarmament too.
Robert Citino. The Path to Blitzkrieg: Doctrine and Training in the German Army, 1920-39. Mechanicsburg: Stackpole Books, 2008 . How did the German army do so well in 1939 when it had spent most of the previous two decades crippled in size and armaments? Citino is the person to ask. The bulk of the book focuses on the Reichswehr period rather than the Wehrmacht, so von Seeckt is the dominant figure here (no, not Fuller, Liddell Hart or even Guderian!)
Kathryn Spurling. A Grave Too Far Away: A Tribute to Australians in Bomber Command Europe. Sydney: New Holland, 2012. Tells the stories of many (but still only a small fraction) of the Australians who served in Bomber Command, drawing on official and personal archives as well as interviews. I have my concerns about writing history as tribute, but since I have previously argued that Australians ought to remember Bomber Command I hope that this book can be part of that process.