The Book of Revelation describes the appearance of Antichrist in terms of parabolic images that few, if any, today understand. Yet the disciples of John, the Apostle who authored the Book of Revelation, insist he taught his own disciples what they meant. In this booklet, two Early Church leaders-Irenæus and Hippolytus, who were second- and third-generation disciples of John-explain some of what they knew about the Antichrist. This book contains excerpts from The Advent of Christ and AntiChrist described above.