Master barista Sage Caplin is opening a new coffee cart in Portland, Oregon, but a killer is brewing up a world of trouble... Portland is famous for its rain, hipsters, craft beers ... and coffee. Sage Caplin has high hopes for her coffee cart, Ground Rules, which she runs with her business partner, Harley-a genius at roasting beans and devising new blends. That's essential in a city where locals have intensely strong opinions about cappuccino versus...