The Number One bestselling crime series featuring Dr Tony Hill, hero of TV's Wire in the Blood, written by the award-winning Val McDermid. The hunt for a serial killer leads from Britain through Europe in this terrifying psychological thriller. A twisted killer targeting psychologists has left a grisly trail across Europe. Dr Tony Hill, expert at mapping the minds of murderers, is reluctant to get involved. But then the next victim is much closer to home... Meanwhile, his former partner DCI Carol Jordan is working undercover in Berlin, on a dangerous operation to trap a millionaire trafficker. When the game turns nasty, Tony is the only person she can call on for help. Confronting a cruelty that has its roots in Nazi atrocities, Tony and Carol are thrown together in a world of violence and corruption, where they have no one to trust but each other.