Dashiell Hammett (1894 – 1961) was an American author of hardboiled detective novels and short stories. Among the enduring characters he created are Sam Spade (The Maltese Falcon), Nick and Nora Charles (The Thin Man), and the Continental Op (Red Harvest and The Dain Curse). In addition to the significant influence his novels and stories had on film, Hammett "is now widely regarded as one of the finest mystery writers of all time" and was called, in his obituary in the New York Times, "the dean of the... 'hard-boiled' school of detective fiction".
This is the only free Audio Book I could find for Dashiell Hammett. When I find more, I will add them to this site. I also added some of the radio programs based on his characters.