If you wanted to learn something about Mongolia and throw in a series of brutal murders, all you need to do is put a British Chief Inspector in your story and send him out there to help solve the crimes.
The author did just that and now I know a little more about the workings of Mongolia, except that the fly in this ointment is that the CI didn't solve anything. He did travel around the place and what a dismal spot it appears to be.
The lead character, Nergui, is interesting enough but, I feel he is not strong enough to hold the book together. Frankly, this murder investigation could have taken place almost anywhere and, if you replaced this travel guide with another, you wouldn't know the difference. Nergui has his superiors on his back, he relies on a stalwart assistant to point him in the right direction and, for a change, there is no love interest. In fact, I can't recall a single female in the book, except by reference (the CI's wife, for example, five thousand miles away) - ah, apologies, one of the dark horses does have his wife with him at a dinner at the British Embassy. This doesn't, of course, reduce the storyline, it just seems to make the whole event rather limp (no pun intended).
I believe this is a debut novel, so I would imagine the author can build on this but whether I would want to read anything else about the Mongolian police force - or, indeed, their way of life - is another matter.