However, the remainder of the article proceeds to discuss the Anti-Defamation League (ADL) and, in particular, Leon Lewis' work to build a spy ring and combat pro-Nazi and German sympathy groups in the United States.
The book focuses on the rise of Naziism in Los Angeles during the 1930s, indicating that "no American city was more important to the Nazis than Los Angeles, home to Hollywood, the greatest propaganda machine in the world".
In his book, Ross further addresses the fact that American government and military forces were unconcerned about the rise of fascism and Nazi-support in Los Angeles and that, as a result, "only Leon Lewis and his daring ring of spies stood in the way".
Hollywood and Hitler provides a look at the rise of Nazi-ism and pro-Hitler organizations in Los Angeles in the 1930s, with a particular focus on "how the disproportionately Jewish backgrounds of the executives of the studios and the workers on the payroll shaded reactions to what was never simply a business decision" and the "proxy battle [that] waged in Hollywood over how to conduct business with the Nazis, how to cover Hitler and his victims in the newsreels, and whether to address or ignore Nazism in Hollywood feature films".
As well, the book identifies and provides information on a number of specific people and organizations who worked against Nazi groups in the United States and, more specifically, in Los Angeles.
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