Alexander McCall Smith " Keepers of the Keys of Heaven is an immensely readable treatment of one of the world's most important institutions. Few historians write as engagingly and wittily as Roger Collins. There is not a dull word in this spectacular triumph of accessible scholarship." History Magazine "Drawing on Vatican archives, accounts from papal ambassadors, spies and historians, the character and policies of the popes, from the obscure to the celebrated, are explained. Collins also addresses the crisis of the Reformation and current debates on the future of the Church, and presents an objective, revealing account of the impact and growth of the pope's power." Theological Studies "The book is a good read; its prose is vigorous and limpid. [Collins] has a good eye for some types of narrative detail, such as delightful factoids of papal history, the ins and outs of papal elections and the maneuverings of cardinals.".