Bailey, Thomas A.  The Lusitania Disaster: An Episode in Modern Warfare and Diplomacy 1975
van der Vat, Dan   The Atlantic Campaign.1988  
Price Alfred, Dr.  Aircraft versus the Submarine
Lambi, Ivo N.  The Navy and German Power Politics, 1862-1914. Boston 1984
Ballard, Robert D., & Dunmore, Spencer. Exploring the Lusitania. (1995) New York: Warner Books.
Ljungström, Henrik. Lusitania. The Great Ocean Liners.
Ellis John, Cox Michael  The World War I Databook: The Essential Facts and Figures for All the Combatants. 2002
Karp Walter  The Politics of War. Wilson's maneuvering U.S. into war 1979
Henig Ruth   The Origins of the First World War. 2002
Germany and the Central Powers in the World War, 1914–1918. 1963
Peterson, H. C. Propaganda for War:  The Campaign against American Neutrality, 1914-1917. Norman: U Press, 1939.
Halpern Paul G   A Naval History of World War I. 1995
Gray Edwyn A   The U-Boat War, 1914–1918. 1994
Hoveth, Richard  The Great War at Sea 1914-1918, Oxford University Press, New York, 1983
Peeke, Mitch  Lusitania Story  Naval Institute Press  2003