I found this more exciting than a detective story! It really is many detective stories, for it covers the whole roster of crime, and all true; spies and saboteurs, kidnappers and bank robbers and ordinary gangsters. Most boys, and perhaps their fathers, too, will find absorbing reading in this story of how the G-Man gets his man: fingerprinting, clouthing, science applied to clues, ballistics and other fascinating machinery of crime detection. Very good chapters, too, on the selection and training of GMen.