One of the best sleuths, Ed Clive, only appeared once in the
Leigh Brackett Novel 'No Good From A Corpse". Because of Brackett's masterly writing skills she was hired to write the Big Sleep screenplay alongside William Faulkner. It's a fantastic book, and the nearest you'll get to Chandler without it being Chandler. It's also available for free at Munsey's (
http://www.munseys.com/book/31305/No_Good_from_a_Corpse)