This one was interesting - Overall rating would be 3-3.5 stars.The story had me turning the pages and unable to put the book down but there were also a few things that I wish were fleshed out a bit more - mainly the background on The Keys (who they were, how they came to be, and ultimately - why did Winter have this trait?). There was quite a bit of background on Blake which I appreciated but I would have liked more on Winter. It seemed critical that her parents were dead and the potential that there could have been a reason relevant to who/what Winter is was brought up but nothing really detailed as to whether their deaths were tied to the story. I also felt like there was only a glimpse of Lucy despite the role she had in Winter's life.There was quite a bit of action and although the storyline was somewhat predictable, I did enjoy it. Overall a good book and I would recommend this to anyone who enjoys a quick, paranormal.