The detective hero, and the detective novel, are not an American invention. But a few authors like Dashiell Hammett and Raymond Chandler made them as American as apple pie. The attitude of Chandler's hard-edged, soft-hearted, wise-cracking hero and the atmosphere of Chandler's Los Angeles were as unmistakably American as Humphrey Bogart, who played Marlowe in the 1946 film version of Chandler's The Big Sleep.