Jewish and Christian Apocalypses: Schweich Lectures, 1913

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

Two Lectures on the Gospels

The Cost of Discipleship

Christian Beginnings: Three Lectures

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

The Religion of the Manichees: Donnellan Lectures for 1924

The New Testament in Its World: An Introduction to the History, Literature, and Theology of the First Christians

The Gospel History and Its Transmission

The Pilgrim's Progress: From This World to That Which is to Come

The Earliest Sources for the Life of Jesus

Learning Theology with the Church Fathers

Church and Gnosis: A Study of Christian Thought and Speculation in the Second Century

The Gnostic Bible: Revised and Expanded Edition

The Old Latin and the Itala: with an Appendix containing the Text of the S. Gallen Palimpsest of Jeremiah

Beyond Belief: The Secret Gospel of Thomas

Evangelion Da-Mepharreshe: Volume 1

Essential Gnostic Scriptures

Becoming Divine: An Introduction to Deification in Western Culture