When did the FBI as we know it have its beginning? What are its functions? How does the FBI track down bank robbers, kidnappers, spies, and saboteurs whose names and faces are unknown? What can a young man do to become an agent of the FBI? The answers to these and many other questions are presented in a briskly written account that is based on information obtained from men of the FBI. The story moves quickly as we accompany a young lawyer who is studying to become a G-man. His training period is difficult, with a great number of subjects to be learned. We understand the reasons for this variety as we watch the unraveling of some famous cases. FBI agents track down notorious kidnappers of the '30s. They locate Nazi saboteurs and spies who attempted to operate in the United States during World War II. They bring about the arrest of a traitor, Harry Gold. These and other dramatic cases are shown to be part of the everyday work of John Edgar Hoover and his 6,000 agents. It is a story that touches the life of every reader, for at this moment the FBI is hard at work protecting you, your family, and your country from the criminal acts of lawless men.