"The Spy of the Rebellion" is a memoir written by Allan Pinkerton, the American detective and founder of the Pinkerton National Detective Agency. The book, also known as "The Spy of the Civil War," was first published in 1883. In this memoir, Allan Pinkerton reflects on his experiences as a detective and spy during the American Civil War. He played a significant role in intelligence and counterintelligence efforts on behalf of the Union during the conflict. Pinkerton's agency was instrumental in uncovering Confederate plots and gathering vital information for the Union army. "The Spy of the Rebellion" offers insights into the methods and challenges of espionage during the Civil War. It also provides a perspective on the role of intelligence and detective work during a pivotal period in American history. The book is a valuable historical document that sheds light on Pinkerton's contributions to the war effort and the intelligence community of the time.