Rivers of London - Ben Aaronovitch
Pretty good. Feels a bit rushed in places, and it meanders a little (insert river joke here) but not to the point of distraction. There's two main plot threads going on that aren't related to each other and the book basically drops one while it focuses on the other a few times as the story goes on. It's not as bad as in some other books I've read, but it does feel a bit sloppy at times.
My main gripe would be the author masturbating about London so much. You get this in any book written by someone who lives in the place the book is set. We get the names of streets and brief histories of locations and buildings every single time anything happens, and it's only ever interesting to people who live in those places. Even then it's not interesting to most because you're not here for a amateur guided tour, you're here for a story.
It's never just running around a corner, it's running down Bow Street and turning on the corner where it meets Russel Street and Wellington Street. It's a kind of literary paradox because writers who do this tend to not describe their setting, instead relying on real-world references to do that work for them. The problem is that unless you know these places as intimitely as the writer these are just names of streets and buildings that may as well be fictional. The writer uses real places to make the story more vivid and grounded, but by doing so they eschew the scene-setting description that actually makes a story vivid and grounded.
I personally know exactly what Bold Street is like, but saying 'I walked down Bold Street' and expecting the real-world reference to be enough isn't going to give you anything close to what that place is like. If I want you to know what I know, the street name alone isn't going to do the job. I'll still have to describe it the way I would a fictional street, but Ben Aaronovitch doesn't do this for his beloved London. Thankfully, most of the story takes place in the one part of London I've actually spent more than a few minutes in, so it didn't get in the way of the story too much, but it's a pet peeve of mine when a setting falls flat because the writer knows it too well and assumes their audience does as well.
Overall though, it was a decent book, and I would never have guessed that the creepy maid creature would bite a man's willy off with her tuppence.