The Rat Racket

With Dr. Keller's genius for hitting at vital spots every time, he now gives us a brand new idea and an ingenious solution. We hope no racketeers read this story. They might, as a result, cause the police some trouble. Fortunately, however, the racket has a flaw. A tale from the Golden Age of science fiction, originally published in the November 1931 issue of Amazing Stories.