Aidan Nichols' timely book is the first full-scale investigation of Joseph Ratzinger's theology, from the 1950s to the present day. It presents a chronological account of the development of Ratzinger's writing that reflects a wide range of historical and theoretical interests. A comprehensive introduction to a figure who is in his own right, quite apart from his significance in the politics of the Church, a major German Catholic theologian of the twentieth century.

This new edition amplifies existing chapters by reference to books by Ratzinger between 1986/1987 and his election as Pope in 2005, and includes two new chapters - Judaism, Islam and other religions, and the secularization and future of Europe.