Okay, so I actually finished this book about a month ago, but forgot to say so!
Eh, I was a little disappointed with this installment of The Order books. Sorcha is still super fierce, and the progression of her character and back story were awesome. She also remains one of the most self-possessed, genuinely strong female protagonists I've ever read. The magic system continues to get cooler, as does the whole steampunk/fantasy mash-up world. I just didn't feel like the plot progressed very much. I liked it, but not quite as much as the other two.
Also, I have to say this about the kindle version: Please, please, please hire an editor. I'm no English major, but there were so many grammatical mistakes throughout the entire text that it was actually distracting.