Waiting on Wednesday is hosted by Jill at Breaking the Spine
Last Sacrifice by Richelle Mead
I only came into this series late (although I have been planning to read it for a while). I'm quite glad I did in a way as it means the wait for this book isn't all that long for me. I won't put up anything about it as the description on goodreads is quite spoilery if you haven't read the others!