I think I preferred this one more than Inside Out, as I think that the idea of the people from Outside coming in caught my attention. I liked how Trella found herself the leader of a revolution, a position she didn't want. This reminded me a lot of The Hunger Games, for some odd reason, but I think I prefer The Hunger Games, by far.
I think the characters develop a lot more in this book. I thought the relationship between Riley and Trella was no way near as good as the one between Valek and Yelena, in the Study Series. I loved this book, though. I think Maria V. Snyder is an amazing writer, I and I wish she would hurry up and finish writing Scent of Magic.