'Initials Only' is a mystery novel written by Anna Katharine Green. The story begins with a dead body of a beautiful woman being discovered on the mezzanine level of a luxurious hotel. She appeared to have been stabbed and, even though no weapon was found in the immediate area, the medical examiner ruled her death as a suicide. However, Sergeant Sweetwater is skeptical and has doubts, particularly because he remembers a similar unsolved murder case that took place in Brooklyn.