RING OF SPIES: How MI5 and the FBI Brought Down the Nazis in America

In 1935-37 America passed several Neutrality Acts to never again take sides in a European conflict. In 1938 public attitudes changed with the American people favoring Britain, one reason being a tip-off received by the FBI on the eve of WWII, leading to expose a Nazi spy ring operating in America. 8 pages of photos.