It was a good short story, if you're looking for something to kill the time or if you're trying to keep up with your reading challenge. It has an interesting premise (if s bit predictable at the end), but I really didn't vibe with those cop characters. They might had made them more sympathetic but there's only so much you can do with a story this short. I did like Martin, though.
In any case, it was entertaining and mysterious, so if you have an hour to spare I'd recommend it.