For a book that is part of a series, this was good. It was action-packed, kept the reader wanting to know more and reached a decent enough conclusion where some threads are closed but others are left tantalizingly open. As the last part of a trilogy it was not so great. Tori's story feels unfinished to me, as does Rae's. What about this demi-demon thing and her master? Mr. McCloud? etc. I realize that Armstrongis going to be continuing the series but at least the next three books will be about someone else, another Edison Group experiment, but that eventually all of the groups will join up. I'm not sure how she'll pull this one off as all Chloe's books were written in the first person, but I suppose that we shall see. I'm not particularly fond of the idea that I have to wait at least three years to get more of the story that I've been left with now.