The Early Church Fathers are the early and influential theologians and writers in the Christian Church, particularly those of the first five centuries of Christian history. The term is used of writers and teachers of the Church, not necessarily saints. It is generally not meant to include the New Testament authors, though in the early Church some writing of Church Fathers were considered canonical.
The Apostolic Fathers with Justin Martyr and Irenaeus(536 pages)
Writings of Clement (of Rome), Mathetes, Polycarp, Ignatius, Barnabas, Papias, Justin Martyr, Irenaeus.
The Didache, or The Teaching of the Twelve Apostles, is a brief early Christian treatise, dated by most scholars to the late first or early 2nd century.
The Martyrdom of Polycarp(7 pages)
“The Encyclical Epistle of the Church at Smyrna, Concerning the Martyrdom of St. Polycarp”
Fathers of the Second Century(567 pages)
The Shepherd of Hermas, and writings of Tatian, Theophilus of Antioch, Athenagorus, Clement of Alexandria.