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"?
Coming Down the Mountain:  The television film was based on a radio play also written by Haddon. The Curious Incident of the Dog in the Night-Time: The Curious Incident of the Dog in the Night-Time is a 2003 mystery novel by British writer Mark Haddon.
i don't know