This story takes a bit of a departure from the first book in the series, Bitten. It's not solely about werewolves anymore. In this installment, we are introduced to a whole new world of supernatural beings such as vampires, shamans, witches, and half-demons. Apparently, all of these beings exist, and it's the first time the werewolves become aware of their existence. The reason for this newfound knowledge is that something is hunting supernatural creatures.
Elana is kidnapped about one-fifth of the way through the book, and the story mainly centers around her and her interactions with her kidnappers and other prisoners. It's fairly interesting, and the who, what, when, and where aspects of the story are quite good. However, just like in the first book, the biggest problem lies in the why. If there was a more compelling reason for the kidnapping and everything that occurs, the story would be significantly better. It's kind of like in the movie Forest Gump when he runs across the country multiple times, and it's an amazing story that makes everyone think there's some great purpose behind it. Then he says, "I just felt like running."
I could never quite understand the reason why the rich guy behind the kidnapping was doing it. There were a couple of possible hints, but no real explanation.
Other than that, I still like the character of Elena and her relationship with Clay. Even though the more interesting relationship is perhaps between Elena and Jeremy.