Alliance of Enemies tells the thrilling history of the secret World War II relationship between Nazi Germany's espionage service, the Abwehr, and the American OSS, predecessor of the CIA. The actors in this great as-yet-untold story were often at odds with their respective governments. Working in the face of competing ideologies and at great personal risk, these unorthodox collaborators struggled to bring about an early peace. By mining secret World War II files that were only recently declassified, as well as personal interviews, diaries, and previously unpublished accounts to unearth some of history's surprises, Agostino von Hassell and Sigrid MacRae shed new light on Franklin Roosevelt's surprising stance toward Hitler before the U.S. entered the war, and on the relationship of American business to the Third Reich. They offer vivid details on the German resistance's desperate efforts to at first avert war and then to make common cause with enemy representatives to end it. And their work details the scope and depth of German resistance and its many plots to eliminate Hitler and why they failed. New names and incredible wartime plots reveal the titanic power struggles that took place in Istanbul and Lisbon---cities crawling with spies. Intense, clandestine communications and spy rings come clear, as do the self-serving neutrality of Switzerland and Portugal and the shocking postwar scramble for German spies, scientists, and more, all to aid in the fight against a new enemy: communism. Alliance of Enemies fills a huge void in our knowledge of the hidden, layered warfare---and the attempts for peace---of World War II. It will fascinate and excite historians, spy and policy enthusiasts, and anyone concerned with the uses of intelligence in trying times. Nowhere has such a complete and provocative history of the wars behind World War II been told---until now.