When beautiful serial killer Gretchen Lowell captured her last victim - the man in charge of hunting her down - it was clear who was really in control of the investigation. So why did she release Detective Archie Sheridan from the brink of death and hand herself in? Two years on, Archie remains driven by a terrifying obsession, and returns to lead the search for a new killer. He knows that one person can help him climb into the mind of this psychopath. But can Archie confront his past demons? 'What may be the creepiest serial killer ever created. This is an addictive read!' Tess Gerritsen