In fact, entrepreneurial tourist operators have clicked on to the trend by offering guided tours of Raymond Chandler's Los Angeles, Ian Rankin's Edinburgh, Colin Dexter's Oxford, featuring rambles through the seedier parts of town and stops at the pubs haunted by Rebus and Morse. The owners of John's Grill in San Francisco, the place where Sam Spade dined on chops in The Maltese Falcon, have capitalized on the connection and turned the diner into a shrine to author Dashiell Hammett.