This book was the end of two YA trilogies set in Kelley Armstrong's Women of the Otherworld world. If you haven't read her YA books, I think they are pretty good. While there is very little overlap between her YA and adult books, it is the same world and some of the adult characters are mentioned and we even see one in this book. But mostly, it is the same world, witches, sorcerers, werewolves, necromancers (most of which are in the first trilogy, Darkest Powers). In this trilogy, you meet new types of supernaturals. This book brings the two YA trilogies together. Characters you met in the first trilogy, come into this trilogy.
This was a great ending to a story that I've been following for several years now. This doesn't come as a huge surprise, because she did a great job ending the Women of the Otherwold series.
This story is action packed and quick read. There is a small amount of YA angst, but it isn't as bad as most. I don't normally read much YA because I got sick of this part of the YA books. There is of course the "love triangle" that I could've done without.
If you've read Ms. Armstrong's Otherworld series, I highly recommend this series, even if you aren't big in YA.