< Not just sell it. I'm pretty sure it's the main game played in the casino in town... somehow. >

[They aren't sure what that has to do with gambling, and they've yet to step foot in the casino themselves, but it's there!]

< But detective novels, huh? It's a place to start. >

[And for what it's worth, they do sound curious. It helps that they've had the chance to play detective themselves, even if they were mostly there to supervise. It leaves them to wonder how a professional (or a fictional professional) might do things.]