What is the FBI? How did it come into being? What has it accomplished? What are its powers? Above all, what does the mere fact of its existence mean to every citizen of the United States. This book, written with the cooperation of J. Edgar Hoover and FBI personnel, will answer these questions once and for all. Includes an Index.

(Key Words: Crime, History, FBI, J. Edgar Hoover, United States, Harry S. Truman, War, Sabotage, Franklin D. Roosevelt, Justice, Federal Bureau of Investigation, Communism, Informants, Don Whitehead).