Chesterton G. K. Chesterton 
Father Brown Complete Murder Mysteries: The Innocence of Father Brown, The Wisdom of Father Brown, The Donnington Affair… [EPUB ebook] 

Shabby and lumbering, with a face like a Norfolk dumpling, Father Brown makes for an improbable super-sleuth. But his innocence is the secret of his success: refusing the scientific method of detection, he adopts instead an approach of simple sympathy, interpreting each crime as a work of art, and each criminal as a man no worse than himself…