Author/historian Bill Mills writes about twentieth-century clandestine operations and intelligence history. Mills holds a BA in History and is best known for true accounts of forgotten episodes and individuals from the shadowy world of espionage. He is the author of The League: The True Story of Average Americans on the Hunt for World War I Spies, Treacherous Passage: Germany’s Secret Plot Against the United States in Mexico during World War I, The Estrada Plot: How the FBI Captured a Secret Army and Stopped the Invasion of Mexico, and Agent of the Iron Cross: The Race to Capture German Saboteur-Assassin Lothar Witzke During World War I. Bill Mills lives in Concord, Massachusetts with his wife and daughter.