von Feilitzsch, Heribert

• Felix A. Sommerfeld and the Mexican Front in the Great War
• In Plain Sight
• The Secret War Council
• The Secret War on the United States in 1915
• Federal Bureau of Investigation Before Hoover : Volume 1
• Federal Bureau of Investigation Before Hoover : Volume I
• Negotiator's Toolbox
• The Secret War on the United States in 1915