The Man Nobody Knew is a book written by Holworthy Hall and published in 1918. The book is a mystery novel that follows the story of a man named John Dene, who is found dead in his apartment in New York City. The police are baffled by the case, as there are no signs of forced entry or struggle, and no apparent motive for the murder.The story is narrated by a young journalist named Jack Barnes, who is assigned to cover the case. As he delves deeper...