The number 1 SPIEGEL bestseller by Sebastian Fitzek: A missing child - a desperate father - one hell of a psychological thriller! He has already confessed to two horrific child murders and led the Berlin police to the gruesomely disfigured corpses. But now Guido T., who is serving time in the high-security wing of the psychiatric hospital, is keeping quiet on the advice of his lawyer. The police are certain: he is also the kidnapper of six-year-old Max, who has disappeared without a trace for a year. But the investigators have no solid evidence, only circumstantial. And without the inmate's testimony, Max's parents will have no certainty and will never be able to say goodbye to their son. Months after Max's disappearance, an investigator from the homicide squad makes the desperate father an incredible offer: he smuggles him into the psychiatric prison hospital where Guido T. is incarcerated in the high-security wing. As a false patient, equipped with a fictitious medical record. So that he can get as close as possible to the child murderer and force him to confess. Because nothing is worse than not knowing. Or so he thought. Until, as an inmate, he learns the gruesome truth ... Bestselling author Sebastian Fitzek sends you on a brilliantly disturbing trip into the psychiatric ward with this psychological thriller.