Ok. So this book. After a somewhat disappointing second book, I was really happy with the final installment of this series. 
 It had much more of a 'Demon Road' feel, more episodic. I liked that, it was a good aspect of the first book that I missed in the second. That said, at some points it did all feel a bit disconnected, like it needed something more substantial to tie the separate stories together. Having been with these characters for 2 books going into this one, I guess I cared about what was going to happen a lot more, because I got attached. 
 It was pretty gory though, I think this is worse than the other two in terms of that, and a couple of times I was genuinely shocked by it, so, beware of that sort of thing. 
 Before I get into spoilers and talking about the plot, then, I'll say that it was all generally a bit shocking for me, but ultimately it was a satisfying end and an enjoyable read. 
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 I'm gonna jump right in at the ending why like seriously why. I knew the moment he lost his demon powers it was going to come back to bite him. But the suddenness of it, and the shock, and how abrupt it was. I wasn't ready. he was just there because he was nice, and he deserved better. 
 The other genuinely shocking moment would be the deaths of the scooby-doo gang. I actually flinched when I read that it was so unexpected - and brutal. 
 The whole Amber dealing with her parents/Shining Demon/ saving Kelly at the end I was worried. I thought she'd actually done it, and I was confused, and then I was relieved, then mildly disturbed. I think the end wrapped up properly for the series, but it was so fast, I hardly had time to process all the deaths and the scene is over and the next we see of Amber she seems completely over it? I'm not going to say it was anticlimactic, because plenty happened. It was possibly a bit too fast paced. Too much happened in too short a time for it to have a real emotional effect on me (after finishing the book it did all hit me, but when reading there wasn't time). 
 Amber's great great nephew or whatever, I don't know how to feel about him. Obviously I'm kind of against his partner, but he seems pretty chill as an individual. 
 Glen! I didn't even like Glen much in the first book, but having him back filled a hole in their group I didn't even know was there. I'm so happy he had a happy ending. 
 Most of the plot I thought was in little sub stories, but I liked that. I could read one, take a break, then come back. It felt a bit like a TV programme in that respect. I suppose sometimes it annoyed me that all the stories were pretty much the same. Serial killer, fighting, gore, more fighting, regrets. But hey, it's a supernatural book written in like 6 months what was I expecting. 
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 My only negative would be that I just felt like all the dialogue coming from the characters was the same. It didn't feel like they had unique voices. They were all just being sarcastic and 'funny', and it wasn't particularly funny and at this point, after three books, I just wanted it to end. 
 Also, Amber had some pretty low moments, and some of her decisions and stuff annoyed me (it's not hard to be nice to people). 
 I think it would definitely have been nice to develop the storyline involving her siblings further, as I was genuinely interested in that. I would have been happy reading about one less rial killer if it meant more detail in other stories,(view spoiler)[ like Abigail. What was up with that? (hide spoiler)]. 
 Overall my favourite scene would be the dark places convention (I love that Amber is a fan). 
 I would say that book one is my fav, followed by American Monsters, then Desolation. 
 I'm glad I read it, and at the end of the day it was a good series, worth reading.