Thirteen years apart.Olivia Shaw has been missing since last Tuesday. She was last seen outside the entrance of her elementary school in Hunts Point wearing a white spring jacket, blue jeans, and pink boots. I force myself to look at the face in the photo, into her slightly smudged features, and I can't bring myself to move. Olivia Shaw could be my mirror image, rewound to thirteen years ago. If you have any knowledge of Olivia Shaw's whereabouts or any relevant information, please contact... I've spent a long time peering into the faces of girls on missing posters, wondering which one replaced me in that basement. But they were never quite the right age, the right look, the right circumstances. Until Olivia Shaw, missing for one week tomorrow. Whoever stole me was never found. But since I was taken, there hasn't been another girl. And now there is.

    Yet, even as he matches wits with his seemingly clairvoyant opponent, Gurney’s tragedy-marred past rises up to haunt him, his marriage approaches a dangerous precipice, and finally, a dark, cold fear builds that he’s met an adversary who can’t be stopped.In the end, fighting to keep his bearings amid a whirlwind of menace and destruction, Gurney sees the truth of what he’s become – what we all become when guilty memories fester – and how his wife Madeleine’s clear-eyed advice may be the only answer that makes sense.A work that defies easy labels -- at once a propulsive masterpiece of suspense and an absorbing immersion in the lives of characters so real we seem to hear their heartbeats – Think of a Number is a novel you’ll not soon forget.