Ohio/Kentucky crime fiction?

Earlier in the summer I was invited to give the Taaffe Lecture in Ohio State University in Columbus in early October. The list of past speakers is impressive so I was honoured to be asked and chuffed to be bracketed in that selection. I’m going to have to up my game to meet expectations. I’m doubling the trip up and also giving a talk at the University of Kentucky in Lexington. When I travel, I like to try and source some local fiction. I usually travel light and pick up a load of books in the local stores. I thought I’d try and prepare in advance this time. For any order to arrive before I cross the Atlantic I’ll probably need to order pretty soon.

So, can anybody recommend any crime fiction set in Ohio (preferably Columbus) and/or Kentucky (preferably Lexington)? Any suggestions will be gratefully received.