The Case of the Lamp That Went Out by Auguste Groner is a mystery novel likely written during the late 19th century. The story revolves around Joseph Muller, an unassuming yet brilliant secret service detective of the Imperial Austrian police, who possesses a keen instinct for solving crimes. As he navigates a case involving a murdered man found in a quiet street, the narrative unfolds with a series of intricate clues and the challenges Muller faces both from the bureaucracy of his job and the moral dilemmas embedded in his investigation.