The Case of the Registered Letter

Step into the world of crime and suspense in 'The Case of the Registered Letter' by Auguste Groner, featuring the brilliant police detective Joseph Müller. Meet Miss Babette Graumann, a desperate woman seeking justice for her nephew Albert, who stands accused of a murder he claims he didn't commit. Commissioner von Riedau, filled with compassion, decides to call upon Detective Muller, renowned for his unrivaled skills. As they delve into the case, secrets unravel, and the search for the truth intensifies.