Somewhere in London a madman was at large. And then one night there came a knock at the door of a quiet lodging house in the Marylebone Road. This novel, based on the Jack the Ripper murders, was made into a film by Alfred Hitchcock. (Goodreads)
Marie Adelaide Elizabeth Rayner Lowndes, née Belloc (5 August 1868 – 14 November 1947), was a prolific English novelist. Active from 1898 until her death, she had a literary reputation for combining exciting incidents with psychological interest. (Wikipedia)