Sometimes you read a story and wonder where it's going, but you keep reading because the conversation between the characters just pulls you in and you want to know where it's going to end. "The Nine Mile Walk" by Harry Kemelman is just such a story. It was his first published story and is considered a classic.
I loved how this conversation between two men trying to outsmart each other wound up solving a mystery. What truly saddens me is the fact that in today's market this story would probably get rejected.