in the turbulent period leading up to the United States' entry into the war. At the start of the book, Tunney introduces the formation of the Bomb Squad in August 1914, emphasizing its role in maintaining order amidst the growing menace of violence in New York City. He shares his extensive background in bomb detection and describes the operational methods and teamwork needed to confront the increasingly aggressive activities perpetrated by German agents and anarchistic groups. The opening portion sets the stage for detailed accounts of investigations, undercover work, and the inner workings of law enforcement during a time of national crisis, revealing the complexities of crime detection in a city rife with enemy agents. (This is an automatically generated summary.)