In addition to surveying over one hundred important Christian thinkers from Justin Martyr to Joseph Ratzinger (now Pope Benedict XVI), the book also covers major creeds, councils, and documents. Representative extracts allow the reader to hear from each of the key thinkers in his or her own words. After having sold more than 50,000 copies in its earlier editions, the current edition has been refined and updated throughout and includes new material on key contemporary thinkers. It will appeal to church leaders, interested laity, and students.