Heribert von Feilitzsch (right) is a writer and historian with degrees from the University of Arizona and Wake Forest University. He has written several books on the German Secret Service in North America between 1908 and 1918, including In Plain Sight: Felix A. Sommerfeld, Spymaster in Mexico, 1908-1914; The Secret War Council: The German Fight Against the Entente in America in 1914; The Secret War on the United States in 1915: A Tale of Sabotage, Labor Unrest, and Border Troubles; and Felix A. Sommerfeld and the Mexican Front in the Great War.
The federal Bureau of Investigation before Hoover
This four-volume US History study covers a time (1908-1924) in the development of the federal Bureau of Investigation that arguably laid the foundation for the modern organization we know.
Charles H. Harris III (left), Professor Emeritus of History at New Mexico State University, Las Cruces. He has written co-authored ten books, including The Texas Rangers and the Mexican Revolution: The Bloodiest Decade, 1910-1920; The Secret War in El Paso: Mexican Revolutionary Intrigue, 1906-1920; The Plan de San Diego: Tejano Rebellion, Mexican Intrigue; The Archaeologist was a Spy: Sylvanus G. Morley and the Office of Naval Intelligence; and The Great Call-Up: The Guard, the Border, and the Mexican Revolution.