British author Philip MacDonald wrote more than 30 accomplished crime novels, many of them after moving to Hollywood in 1931, where he also wrote and produced more than 100 scripts for the silver screen. His first solo novel, The Rasp (1924) introduced Colonel Anthony Gethryn, a gentleman detective who went on to appear in a dozen novels, including The Noose, The Maze and finally The List of Adrian Messenger in 1959.