The setting for An Unfortunate Prairie Occurrence, the third and best of Jamie Harrison's laconic Montana mystery novels, is the small town of Blue Deer, just miles from Yellowstone National Park but far, far away from anything resembling mainstream, middle-class America. Though it's not a high-crime zone by any measure, Blue Deer is a vortex of dysfunction, its geographic isolation breeding a sense of year-round cabin fever. Fretful, jumpy and deeply divided between new-money urban refugees playing cowboy and no-money long-time residents living off resentment and odd jobs, Blue Deer is also the "New West" in microcosm.
Sheriff Jules Clement is...