Historian and retired archivist Timothy Mulligan has written three books and 20 articles on military history, most relating to the Second World War in Europe, including Lone Wolf: The Life and Death of U-Boat Ace Werner Henke and Neither Sharks Nor Wolves: The Men of Nazi Germany's U-Boat Arm. He received his Ph.D. in diplomatic history from the University of Maryland in 1985. During his 34-year tenure as an archivist with the National Archives and Records Administration, he also compiled the two-volume finding aid World War II: Guide to Records Relating to U.S. Military Participation. This guide describes approximately 200,000 cubic feet of records in National Archives custody, and received the Society of American Archivists' C.F.W. Coker award in 2009. Now retired, Timothy teaches a course on "History Through Hollywood."