Ante-Nicene Fathers: Fathers of the Early Church (Complete)

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

The History of the Christian Church (Complete)

The Cost of Discipleship

A Concise History of the Catholic Church (Revised Edition)

America: A Sketch of the Political, Social, and Religious Character of the United States of North America in Two Lectures

The Gnostic Bible: Revised and Expanded Edition

History of the Christian Church: Including the Bible

The Harmony of the Reformed Confessions, as Related to the Present State of Evangelical Theology: An Essay Delivered before the General Presbyterian Council at Edinburgh, July 4, 1877

Beyond Belief: The Secret Gospel of Thomas

Theological Propaedeutic: A General Introduction to the Study of Theology

Becoming Divine: An Introduction to Deification in Western Culture

Christ and Christianity

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

A Select Library of the Nicene and Post-Nicene Fathers of the Christian Church, First Series, Volume 5: Augustin: Anti-Pelagian Writings

Signs of Life: 40 Catholic Customs and Their Biblical Roots

A Select Library of the Nicene and Post-Nicene Fathers of the Christian Church, First Series, Volume 1: The Confessions and Letters of Augustin, With a Sketch of His Life and Work

Challenging the Traditional Interpretations of Justification by Faith, Part 1

The Principle of Protestantism: Lancaster Series on the Mercersburg Theology