Evan Mawdsley is an international historian who has written extensively on the Second World War. Educated at Haverford College, the University of Chicago, and the School of Slavonic and East European Studies, his work for many years dealt with twentieth-century Russian history, where he wrote and taught on the revolution, the civil war, the Stalin period and the nature of the Soviet-era political elite. His Russian Civil War, originally published in 1987, remains in print as a standard work on the subject. In the past fifteen years his research and writing have concentrated on the Second World War. Thunder in the East: The Nazi-Soviet War, 1941-1945 was published in 2005. After completing that book he moved in two quite different directions, producing a broad-brush treatment of the whole global conflict in the form of World War II: A New History (2009), and zooming in to examine a critical two weeks of the conflict with December 1941: Twelve Days that Began a World War (2011). He is currently writing an overall naval history of the war, as well as preparing a second edition of Thunder in the East. He was Professor of International History at the University of Glasgow and since 2010 has been an Honorary Professorial Research Fellow there. John Ferris is Professor of History and Fellow at The Centre for Military and Strategic Studies at the University of Calgary. He received an M.A. (1980) and a Ph.D. (1986) in War Studies from King's College London. He has published four books and one hundred academic articles or chapters in books, on diplomatic, intelligence and military history, as well as contemporary strategy and intelligence. His books have been published in Australia, Canada, France, Japan, Singapore, Turkey, the United States and the United Kingdom: they have been translated into French and Japanese. He comments in national and international media, on Canadian and American foreign and military policy. He has been Cryptologic Historical Scholar in Residence at The National Security Agency and Killam Residential Professor at the University of Calgary, and is Honorary Professor at the Department of International Politics, the University of Wales, Aberystwyth, and Adjunct Professor at the Department of War Studies, Royal Military College of Canada. He has just completed a book on the theory of intelligence and is working on a study of Britain, Japan, the United States, intelligence, deception and strategy, and the outbreak of the Pacific War. Richard Bosworth is Senior Research Fellow at Jesus College, Oxford. Joseph Maiolo is Professor of International History in the Department of War Studies at King's College London. Michael Geyer is Samuel N. Harper Professor of German and European History in the Department of History at the University of Chicago. His recent publications include the edited volume Beyond Totalitarianism: Stalinism and Nazism Compared (Cambridge, 2009). Adam Tooze is Professor of Modern German History at Yale University, Connecticut. His published works includes Wages of Destruction: The Making and Breaking of the Nazi Economy (2007), and The Deluge: The Great War and the Remaking of Global Order, 1916-1931 (2015).