Peter Seewald is a veteran German journalist who has done two other best-selling book length interviews with Joseph Ratzinger (now Benedict XVI), Salt of the Earth and God and the World. He is also the author of Benedict XVI: An Intimate Portrait, and Pope Benedict XVI: Servant of the Truth. Pope Benedict XVI is the spiritual leader of over one billion Catholics, and a highly regarded theologian and the author of dozens of best-selling spiritual and theological books.