Bishop, Eleanor C. Prints in the Sand: The U.S. Coast Guard Beach Patrol During World War II. Missoula MT: Pictorial Histories Publishing Co., 1989. [The landing of 4 Abwehr agents on Amagansett, Long Island, New York, from U-584, and 4 agents on Ponte Vedra Beach, south of Jacksonville, Florida from U-202 in June 1942, are described on pp. ix-x; the November 1944 landing of agents Gimpel and Colepaugh in Maine from U-1230 is described on pp. 30-31.].

Blair, Clay. The Hunted, 1942-1945. vol. 2 of Hitler's U-Boat War. New York: Random House, 1998. [The unsuccessful mission in August 1944 to land an agent from U-1229, the agent's capture after the sinking of the submarine, and the Navy's decision to treat him as a prisoner of war rather than turn him over to the FBI is described on p. 644. For the story of the two agents landed in November 1944, see pp. 646-647.].

____. The Hunters, 1939-1942. vol. 1 of Hitler's U-Boat War. New York: Random House, 1996. [For the landing of agents in June 1942, and their subsequent fate, see pp. 603-606. Also mentioned is the arrest of 14 friends and relatives of the agents, and the conviction of 10 of them. President Truman later commuted the sentences of the friends and relatives.].

Breuer, William. Hitler's Undercover War: The Nazi Espionage Invasion of the U.S.A. New York: St. Martin's Press, 1989. [See the appendix on pp.321-324, "Espionage Agents Convicted in the United States, 1937-1945."].

____. Top Secret Tales of World War II. New York: John Wiley & Sons, 2000.

Cohen, Gary. "The Keystone Kommandos." Atlantic Monthly 289, no.2 (Feb. 2002): 46-59. [Includes two photos of the military tribunal, mug shots of the eight prisoners as well as short biographies, information on the execution and burial of the condemned, and an anecdote about George Dasch's later years and his friendship with Charlie Chaplin.].

Conn, Stetson, Rose C. Engelman, and Byron Fairchild. Guarding the United States and Its Outposts. Washington DC: Office of the Chief of Military History, 1964. [For the June 1942 landings see pp. 99-100.].

Dasch, George John. Eight Spies Against America. New York: R.M. McBride Co., 1959.

Farago, Ladislas. The Game of Foxes: The Untold Story of German Espionage in the United States and Great Britain During World War II. New York: David McKay Company, 1971.

Gimpel, Erich with Will Berthold. Spy for Germany. London: Robert Hall, 1957.

Hadley, Michael L. U-Boats Against Canada: German Submarines in Canadian Waters. Kingston and Montreal, Canada: McGill-Queen's University Press, 1985. [Includes the story of Werner Alfred Waldmar von Janowski who landed from U-518 in Canada on 9 Nov. 1942, as well as the story of the unmanned German weather station established by U-537 in northern Labrador on 22-23 October 1943.].

Hilton, Stanley E. Hitler's Secret War in South America 1939-1945: German Military Espionage and Allied Counterespionage in Brazil. Baton Rouge: Louisiana State University, 1981.

Jong, Louis de. The German Fifth Column in the Second World War. Chicago IL: University of Chicago Press, 1956.

Kahn, David. Hitler's Spies: German Military Intelligence in World War II. New York: Macmillan, 1978. [The story of the November 1944 landing of two agents, including a map of their landing place in Frenchman Bay, is in Chapter 1, "The Climax of German Spying in America," pp. 2-26. Useful footnotes are on pp. 553-554].

Lardner, George, Jr. "Nazi Saboteurs Captured." The Washington Post Magazine (13 Jan. 2002): 12-16, 23. [Includes photos of the eight saboteurs landed in June 1942, information on their trial before a military tribunal, the execution of six of them by electric chair, and the fate of George Dasch after his return to Germany in 1948.].

Morison, Samuel Eliot. The Atlantic Battle Won, May 1943 - May 1945. vol. 10 of History of United States Naval Operations In World War II. Boston: Little, Brown and Company, 1960. [ See pp. 326-327 for brief information on the unsuccessful attempt to land Mantel from U-1229; and pp. 330-331 for the landing of agents in November 1944.].

____. The Battle of the Atlantic, September 1939 - May 1943. vol.1 of History of United States Naval Operations In World War II. Boston: Little, Brown and Company, 1947. [See p. 200 for brief information on the June 1942 landings.].

Noble, Dennis L. The Beach Patrol and Corsair Fleet. Washington DC: Coast Guard Historian's Office, 1992. [See pp. 8-11 for the story of the agents landed in June 1942 on Long Island.].

The Oxford Companion to World War II. New York: Oxford University Press, 1995. [See "Latin America at War" for a summary of Latin American activities not emphasizing espionage; and "Spies," which includes a section on German intelligence in the Western Hemisphere.].

Rachlis, Eugene. They Came to Kill: The Story of Eight Nazi Saboteurs in America. New York: Random House, 1961.

Whitehead, Don. The FBI Story. New York: Random House, 1956. [For the landing of German agents in 1942 and 1944, see pp. 199-206.].

Wighton, Charles and Gunter Peis. Hitler's Spies and Saboteurs: Based on the German Secret Service War Diary of General Lahousen. New York: Henry Holt and Company, 1958. [Lahousen was head of the Abwehr's Abt. II, which was responsible for sabotage.].

Willoughby, Malcolm F. The U.S. Coast Guard in World War II. Annapolis MD: United States Naval Institute, 1957. [The landings of German agents is discussed on p. 46, within a chapter on the Beach Patrol.].