Police Your Planet is a hard-boiled story of cheap grifters, Martian slums, and rampant crime features ex-cop Bruce Gordon, shipped to Mars with a knife, 100 credits, and a yellow card that means no return...Lester del Rey was an American science fiction author and editor at Del Rey Books. He was awarded the E. E. Smith Memorial Award for Imaginative Fiction, Balrog Award and the 11th SFWA Grand Master.