The Most Dangerous German Agent in America

On the morning of April 27, 1935, Louis N. Hammerling fell to his death from the nineteenth floor of an apartment in New York City, where he lived alone. Hammerling was one of the most influential Polish immigrants in turn-of-the-century America and the leading voice and advocate of the Eastern Europeans who had come to the country seeking a better life. He was also a pathological liar, a crook, a swindler, a ruthless entrepreneur, and a patriot—of which nation he could never decide. In the Unit