The Case of the Golden Bullet FULL audiobook

The Case of the Golden Bullet FULL audiobook by Grace Isabel Colbron (1869-1943) and Augusta Groner (1850-1929) Joseph Muller, quiet mannered detective, tries to solve the mystery of a man who died in his study, by a bullet hole in the chest. But all windows and doors were locked, from the inside. (summary by Dawn Larsen)