I enjoyed this book overall, but my problem was that the plot and the action really didn't start until you were 75% through the book, and from that point everything kind of rushed to finish. I wish we had learned about the dangerous side of Vincent's life earlier in the story so that it would feel as though the first half of the book was leading somewhere. 
 Also, I was frustrated with Kate's logic in breaking up with Vincent, this was the emotional story that I guess was supposed to occupy us for the first half of the book but it didn't make much sense to me. If you are struggling after your parents die to try loving someone again, wouldn't an immortal boyfriend kind of the dream, not the nightmare? I just didn't see her logic there, I realize that she wouldn't want to watch him get killed on a regular basis, but I would think the part about him coming back all the time would be a mitigating factor there. 
 One thing that the author did really well is that she took the time to make the reader feel how devastated Kate was after the death of her parents, often in YA paranormal books when loved ones die the characters are just expected to get right back up and keep moving. Here, I think the author did a great job of conveying how that pain never really goes away, it may subside eventually, but it is never truly gone. 
 I like that the book felt like it actually concluded - no frustrating cliffhangers, and I am interested in reading the sequel.