I'm torn between 3 and 4 stars, but as I like the following book better, 3 stars it is. 
 I honestly didn't know what to expect having read both pretty negative and raving positive reviews. 
 So first of all, the heroine Mercy. I really like her. She is the first heroine in this genre who isn't a terribly insecure teenager universally loved by all the awesome men - a trope I'm really starting to despise. Okay, men still do like her but I can see why. She's 31, a car mechanic, independent, doesn't take shit from anyone, doesn't spend half the book talking abouth her body and related insecurities. What a refreshing character, I can really relate to something like that. There's more to people (women) than hair colour, boob size and amount of body fat. 
 There's a big potential for a love triangle with her sexy neighbour Alpha werewolf Adam and her first love Samuel. But this book doesn't concentrate on the romance. I generally associate adult fiction with either a lot of violence or a lot of sex, this book has neither, which is another pleasant surprise. There's a bunch of other supporting characters which I really enjoyed like Warren the gay werewolf and his divorce attorney boyfriend Kyle or Stefan the VW bus riding vampire. 
 So what is this book about? Action and world-building. The world is quite interesting, my only complaint is that I find the word "werewolf" quite a mouthful even when I'm just reading it in my head and it's in every other sentence, so it disrupts the flow for me a bit. But the mystery is quite compelling and once I got into it I really wanted to find out how it turns out. 
 The prose could probably use a little more polishing but it's an overall enjoyable read and I'm looking forward to the other books in the series.