Popular Patristics Series is a 33-book series with 33 released primary works first released in 170 with contributions by John Chrysostom, Theodore the Studite, Ephrem the Syrian, Gregory of Nyssa, Irenaeus of Lyons, Gregory of Nazianzus, Barsanuphius of Palestine, Basil the Great, Cyprian, Pope Gregory I, Mark the Monk, John Anthony McGuckin, Daniel K. Griggs, Athanasius of Alexandria, Didymus the Blind, Maximus the Confessor, Hippolytus of Rome, Melito of Sardis, Alistair Stewart-Sykes, Cyril of Jerusalem, and Saint Romanos the Melodist.