Ever wondered what happens when mathematics gets really out of control? Or if murderous teens had the self-control and foresight to plan as well as they thought they could? Maybe you've been sure that, somewhere out there, your perfect double is trying to ruin your life, or that there really are ghosts in the ruins and they mean you harm. What if your surgeons don't wish you well, or the OAP upstairs is after your soul? These questions and more are answered in this collection of chillers and shockers by Christopher Law. This new edition includes an extra story.