The Apostolic Fathers, Volume II: Epistles of Barnabas, Papias, and Quadratus. Epistle to Diognetus. The Shepherd of Hermas is a scholarly book published by Harvard University Press in 2003, as part of the Loeb Classical Library series. Authored by Bart D. Ehrman, this hardcover book delves into the literary criticism and religious themes of early Christianity, specifically in the New Testament era. It spans 496 pages and provides valuable insights into the history and interpretation of biblical texts, making it a must-read for those interested in the roots of Christian doctrine and tradition.