Share 'Hardboiled stand-alones?'

Hi, everyone. I'm looking for recommended titles that DO NOT feature a private investigator, cop, reporter, lawyer, etc. I'm looking for stand-alone books, where a civilian is pulled out of his everyday life to become involved in a mystery/adventure. My preference is for a male protagonist, and something stylistically similar to Chandler, Hammett, and MacDonald (although I don't have a preference…