Love this book! This is a more recent tale in the series, but it is the first one I came across and got me hooked immediately. The rest are just as great, and I don't say that carelessly. If you like Anne Perry, you will love the Ian Rutledge series by Charles Todd.
I was scratching my head at the conclusion -- plus I had grown tired of Hamish way before this entry in the series. But I had to give it three stars because I actually finished it (I sometimes give up after a few chapters on books that aren't well written or interesting.) If you haven't read the previous book you won't understand the references to the woman in Westmoreland, although that's not a deal breaker. The motive for the killings is pretty silly and the sub-plot about the casings is a stretch, and leaves some questions. Again, the details about life in the village brings it to life (more maps, please, as in Cold Treachery.)