Views on this book were mixed in my what-to-read-in-2014 poll, but I have to say I rather enjoyed it. Like Paul Cornell's London Falling, which I read this time last year, it has contemporary London police being caught up in a world of eldritch horror; but it scored for me in the central character's continuing self-doubt, not so much about whether he wants to be a policeman caught up in the occult, but about whether he wants to be a policeman at all; and in the clever invocation of a well-known folk tale which is stunningly revealed about halfway through. The personified rivers themselves (Fleet, Tyburn, Beverley Brook) are a brilliant concept, and the London streetscapes convincingly envisaged. I will definitely go get the sequels now.