Question: Who wrote the 2007 British television film "Coming Down The Mountain" and authored a 2003 mystery novel based on Arthur Conan Doyle's short story "Silver Blaze"?
Sentence (from "The Return of Sherlock Holmes (1929 film)"): The film stars Clive Brook, H. Reeves-Smith, Betty Lawford, Charles Hay and Phillips Holmes.
Relevant evidence: No