Monasticism: Its Ideals and History and the Confessions of St. Augustine

Cold-Case Christianity: A Homicide Detective Investigates the Claims of the Gospels

Sources of the Apostolic Canon: with a Treatise on the Origin of the Readership and Other Lower Orders

The Cost of Discipleship

The Letter from Rome to Corinth from the Era of Domitian: 1 Clement

Zealot: The Life and Times of Jesus of Nazareth

History of Dogma, Volume 1

The Gnostic Bible: Revised and Expanded Edition

Bible Reading in the Early Church

What It Means to Be Protestant: The Case for an Always-Reforming Church

The Apostles' Creed

Beyond Belief: The Secret Gospel of Thomas

Luke the Physician: The Author of the Third Gospel and the Acts of the Apostles

Becoming Divine: An Introduction to Deification in Western Culture

Outlines of the History of Dogma

A Concise History of the Catholic Church (Revised Edition)

The Origin of the New Testament: and the most important consequences of the new creation

Signs of Life: 40 Catholic Customs and Their Biblical Roots

The Date of the Acts and the Synoptic Gospels

Challenging the Traditional Interpretations of Justification by Faith, Part 1