On January 30, 1918, Lothar Witzke, the most dangerous German agent in the western hemisphere had reached his destination. His mission: to destroy American defense plants, organize strikes in critical industries, and at a time of intense racial unrest, to incite an insurrection among the southern black citizenry. He was to begin the campaign of terror by murdering a U.S. intelligence officer in cold blood.

On January 16th Witzke and several confederates departed Mexico City for the U.S. border. After crossing 1500 miles of rugged territory, encountering bandits and other hazards along the way, Witzke reached Nogales. But unknown to the saboteur-assassin, the German espionage network in Mexico had been penetrated by Allied intelligence and one of his companions was a double agent. Captured by U.S. Army intelligence and tried before a military court-martial, Lothar Witzke became the only enemy agent sentenced to death in the United States during World War 1.

The Witzke mission was the intelligence game played at its highest level - a plan for destruction on a massive scale, violent insurrection, and assassination, complete with master spies and double agents, diabolical sabotage devices, secret codes, and invisible ink. Meticulously researched and written in the style of an adventure novel, Agent of the Iron Cross is the first detailed account of this legendary espionage operation.