He is the author of Facing the Second World War: Strategy, Politics, and Economics in Britain and France 1938-1940 (Oxford University Press, 2003), as well as several journal articles book chapters. He is currently writing a history of socialist internationalism, which examines the efforts of British, French and German socialists to cooperate with one another on international issues between 1918 and 1960, to be published by Oxford University Press. He is also co-writing, with Martin Horn, a history of the Ford Motor Company in France during the Second World War, to be published by Cambridge University Press.