Guy Garrick, a detective who has made a scientific study of crime, has been the hero of a number of earlier short stories. In the present novel he is engaged in tracking down a gang of motor bandits. The police, the city detectives, the automobile detectives and Guy Garrick are all working on the problems, and the unravelling and subsequent glory of Garrick are very exciting. The eleventh volume in the chronicles of Craig Kennedy, scientific detective, takes up the familiar and successful formula for a new round of adventures, written by Arthur B. Reeve. Reeve was an American mystery writer who created 82 Craig Kennedy mystery stories. An enjoyable collection, especially for those interested in sleuthing aided by science.