I should have seen the ending coming. since reading most of Armstrong's works, there is a real sense of - final act what the hell- or heres some things to think about- but tada- its nothing like you thought! or if you skipped books 3 and 5 and 7, well youre out of luck. Apart from that it is good. I liked Savannah as a narrator, i actually enjoyed not having to make sure no one was reading over my shoulder from crazy awesome explicit sex scenes. true elena and clay are not in this tale, soo it can be assumed a tamer read. I did like the bits and pieces coming together- till the main mystery was solved. 
* spoilers*
Leah, I pretty much hate her as a character. Yeah, shes evil and the bad guy so youre supposed to hate her. Thats not why i dislike her. Her anger and violence seems- comicbook villan- the nemesis. But as to what she is rallying against I am at a loss. 
Adam I like, but then I also liked Michael. When I first started reading this, I kept thinking. " so there are 3 guys, one savannah, and one of the 3 she has a life long crush- does that move on to somekind of obsession at some point, a human who is doing the same thing as she is and likes cars, and the other half demon who is helping out a friend. Who will be the romantic lead?" there really isnt one. and that is ok. we get smoldering kisses and silly first dates, hearts beating fast and eyes locking, but nothing is of real consequence.
I did miss Paige and all her goody-two-shoes ass kicking. I did miss Eve and her snark. But Savannah makes a good blend of the two, a quick surefire voice, but with some real heart to back it.Of all the books i think 3 and 5 were my least favorite, maybe also Hope's books, but i really did enjoy book 11. I think it may be because i took a break in reading the otherworld series.Anyway its stupid late here and I have a cold, so I'm going to finish this later-