Audiobook Derailed: A Detective Ravn Thriller, written by Michael Katz Krefeld. New propulsive thriller from Denmark’s King of Crime. Criminal investigator Thomas Ravnsholdt—better known as Ravn—is on leave from Copenhagen’s special crime unit following the brutal murder of his wife. Racked with guilt over her death, Ravn must navigate the seedy underbelly of Stockholm he'd hoped to leave behind when he is informed of a young woman's strange disappearance.