Too long and seemed mostly filled by péripéties just strung together. Perhaps I skipped too far ahead in the series. It was saved from the temptation of a one-star rating by the dinosaur, but I don't think it deserves to climb above a two.
(show spoiler)I found it strange that the book used American spelling conventions throughout and yet used "grey". Shiela made me cringe any time I saw her name. Maybe it was supposed to be "shy-lah"?
As for addressing Queen Mab as thee instead of you, it just wasn't logical. It's a cheap gimmick to make the dialogue sound old-timey. Yes, supernatural beings were generally addressed as thou and not you when that distinction in English was in vogue, but it certainly isn't Dresden's habit and he mixed the two anyway: "Greetings, Queen Mab. I do beg your pardon. It was not my intention to disturb thee." It makes more sense for Queen Mab to use thou but even here Butcher doesn't bother to use it consistently and we're left with a gimmick that doesn't work very well.
Yes, I'm picking small things apart but the dialogue was even worse than in the first novel, I think. And the plot was driven by events being turned against Dresden because he keeps hatching these vulnerable plans that only make sense so that the bad guys can foil them.
It didn't help that the book couldn't hold my attention and I kept turning back because my brain wasn't processing the words I was reading.