The story starts with three seemingly unconnected narratives. First, that of Ryan, who in the opening scene is being rushed to the hospital with his detached hand. Then also Lucy, recent high school grad running away with her history teacher. Finally, there's Miles, searching for his missing twin brother. What propels you through the book is wanting to find out how these three connect up. I had some guesses, some right, but didn't get quite how all they all fitted till the end--the author says it was the same for him, that he wrote it with those first scenes and characters in mind, then wrote them trying to figure out how they connect--maybe that helped in keeping the sense of mystery, although in the end it does fit so nicely with such a firm click there's a sense of inevitability.
Besides the mystery, the theme of identity keeps recurring in this novel in interesting ways as both the key to the mystery but in a way that also has you turning in your mind what makes up your own identity. The way identity theft in the information age plays into this makes this a very contemporary novel, one that couldn't have been written ten years ago. Although Lucy and Ryan have less than nice aspects to their characters, I did come to care for them (and Miles) and that was another source of suspense as you watch them get deeper into what you worry cannot end well. The prose is clean and the book sucked me in. One of those novels you better pick up when you can clear some hours to spend--because you won't want to put it down.