While this book is about Ivy and Vasic, it is also about the aftermath of Silence. There are repercussions from Silence's fall and people are dying. There was a big learning about regarding the empaths and what they can do.
I did enjoy reading about the Arrows and how they are choosing their jobs and what they do (and I'm excited for Aden's book). This is a Psy-Psy pairing (as is the next book) and there are some Changeling bits in this one, but not much. Overall this is much more serious in tone. The sexy-times are fairly tame from previous books too.
I did take a little bit of time to get invested in this one, but once I did, it was hard to put down. There is still a threat from Ming that (I assume) will be dealt with in a later book. I did think the ending was a little rushed (with regard to Ivy's solution regarding the Infected).(show spoiler)