Father Brown was G K Chesterton's most famous invention, the pudding-faced priest who solves crimes by using his knowledge of human evil and his ability to enter the mind of the criminal. First created in 1910, he was Chesterton's encapsulation of the atmosphere of that age, and his protest against its complacency and materialism. Later stories reflect the tensions preceding the Great War, the brittle sensationalism of the 1920s, and the ideological...