Although Rivers of London
isn't a perfect title, it certainly suits the book better than Midnight Riot
. The titular riot doesn't even occur at midnight or have anything to do with midnight. Revenant Riot would at least make more sense, but perhaps alliteration isn't "in" in publishing these days.
Not a perfect book either, but it starts off with a lot of energy and although it slows down as the story progresses, it doesn't completely lose its momentum. Following the lowly fresh off-of-probation police constable Peter Grant worked well too. Really, I don't know what to say about the book, so just read it. Assuming the genre "humorous urban fantasy police novel" works for you, of course. It had me laughing out loud on more than one occasion.