After spending the past three years following this series, I can only express my pure disappointment in this train wreck fo a series ender. 
 The first novel in the series, while I had a few problems with some of the plot elements (The whole girl wants to sleep with wolves being one of them), I got through it and really felt there was something there. 
 Second novel was an improvement, with fresh voices and plot development. And then the third novel came along. I have so much to say and I'll try my best to sum it up. 
 Maggie Stiefvater is a very very talented writer. She writes beautifully and uses very rich, lyrical descriptions that make me really see the emotions and actions of the book. But she doesn't close the deal on this series, and before anyone jumps on me as per the end of the book this IS the end of the series. 
 So here's my problem. This book focused so much on Cole/Isabelle but I didn't care for them. There was so much focus on these two that the real love of Sam/Grace got lost in translation. 
 After the whole lost love of Sam/Grace, you come up with the hundreds of questions that are left unsolved by this novel. Nothing is answered, in fact, more questions come up from this novel than anything else. For example, what is this cure? What happens to it? What happens with Grace and her parents or does she just leave them? What about school? NONE of this is described. 
 There is so much time focused on the science part in the first book, and yet nothing is answered. Why are the wolves transforming in MN? Is MN the only place that has this problem? If not why are the other areas not dealing with deaths, etc? How do others handle it? 
 Overall, I feel as if I wasted time and energy on a series that fell flat. As a reader I feel cheated, and am sadden that such a talented author had to leave the book as such.