High Quality Content by WIKIPEDIA articles! Leonard Patrick O`Connor Wibberley (April 9, 1915 – November 22, 1983): a prolific and versatile Irish-born author who spent most of his life in the United States. Wibberley published, under his name and also three pen-names, over one hundred books. He is best known for five satirical novels about an imaginary country Grand Fenwick--particularly for the first of these, The Mouse That Roared.