He specializes in the history of Russia, specifically in the revolutionary period through the 1920s. He is especially interested in historiographic and cultural issues, notably historical memory, and Soviet film. His book, Telling October. Memory and the Making of the Bolshevik Revolution (Cornell University Press, 2004) dealt with the mythicization of the October Revolution. An edited volume, Trotsky's Challenge: The 'Literary Discussion' and the Fight for the Bolshevik Revolution (Brill, 2015) examined a crucial moment in early Soviet political history. He is currently working on a broad study of historical memory in modern Russia.