3.5/5. if you ignore that Lock and Mori are supposed to be Sherlock Holmes and Moriarty, and that they're British, it's not a bad book. A bit slow, but it's tolerable. however, as it is supposed to be Sherlock and Moriarty, it loses points because the characterisation seems off, and in some ways, it's like BBC Sherlock mashed up with City of Bones, with all the fantasy elements sucked out. it's better than most of the Mary Russell series, and I probably will read the second book, but it's just meh. I'm actually disappointed that I don't like it more and it's not as good as I anticipated.