Philip MacDonald (1900-1980) was the grandson of the writer George MacDonald. During World War I, he served with the British cavalry in Mesopotamia. He later trained horses for the army and was a show jumper. MacDonald moved to Hollywood in 1931. He was one of the most popular mystery writers of the thirties and wrote over twenty-five novels. He also wrote many screenplays and fifteen of his novels were made into film adaptations.
