J. B. Bury(1861-1927) was an Irish historian, and an expert on the Greek and Roman Empires, the Regius Professor of Modern History at Cambridge University, and the author of many scholarly works, includingHistory of the Later Roman Empire(still in print),Invasion of Europe by the Barbarians(recently reissued), and the present biography of St. Patrick.Jon M. Sweeneyis best known for his editing of Sabatierrsquo;s classic biography,The Road to Assisi: The Essential Biography of St. Francis, which sold more than 40,000 copies and was a featured selection of The History Book Club and Book-of-the-Month Club.