This book is ok, I guess, but I don't get the hype. The characters aren't very interesting and not much happens, but it's not a chore to read or anything. It's fine.
I didn't hate this book, but I didn't really like it either. I had hoped it would be better than the first one but it's just more of the same. There's no real mystery and the climax is very weak.
The worst thing about the book though, is the way one character persistently and far-too-frequently calls the protagonist "Steed". It's in every other sentence she speaks.
Serialised fiction that the author stopped writing (or at least posting). I was enjoying it, but it's been so long now I'm unlikely to ever go back to it even if he does start posting again.
The book is very well laid-out and contains such useful information about the game and setting that you can run a session with virtually no preparation (other than having read the book and, ideally, at least played before).
My only real criticism is that the setting seems to consist of all of the author's interests mashed together. I'd have preferred a more straight-forward crime-fiction setting rather than including the steampunk and ghosts and horrors outside the cities and so forth. When running the game myself I tend to de-emphasise the supernatural elements, but I'd have preferred they not be part of it at all. It's an issue I have with a lot of RPG settings, where I love the core concept but find myself less and less interested the more elements are added on top of it.
Mitchell comes across as extremely conservative: not reactionary or right-wing, just generally uncomfortable with change and incapable of imagining it being for the better. "The system is terrible, but unfortunately better things aren't possible" could be the tagline for this book. His view seems to be that things are bad and will remain bad, unless they get worse.