Audiobook Missing: A Detective Ravn thriller, written by Michael Katz Krefeld. One missing person. Endless buried secrets. When a man vanishes after embezzling funds for a secret rendezvous in Berlin, Ravn is drawn into a chilling investigation by the man's sister, Louise. The mystery deepens as Ravn discovers a pattern of lonely men disappearing under mysterious circumstances, a trail leading back to the dark days of Stasi-Germany.