William Rhodes Davis was Adolf Hitler's main agent of influence in the United States. Mystery Man tells his strange story for the first time. A superb manipulator, Davis could beguile German leaders while simultaneously receiving the assistance of American labor leader John L. Lewis and President Franklin D. Roosevelt. Among his many nefarious deeds was the acquisition of much of the oil Hitler needed to start World War II and the delivery of five million dollars from Germany to the Republican Party for the 1940 presidential campaign. This revealing book tells how powerful American, British, and Mexican business and political leaders helped a talented and complex man serve Hitler while he made and lost and made again millions of dollars. It also looks into the Establishment's attempts to cover up the part that prominent American leaders played in Davis's activities - and perhaps in his mysterious death.