The Courage to Be

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

Dynamics of Faith

The Cost of Discipleship

Biblical Religion and the Search for Ultimate Reality

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

The Socialist Decision

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

The System of the Sciences According to Objects and Methods

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

The Shaking of the Foundations

Learning Theology with the Church Fathers

Systematic Theology: Volume Two: Volume 2

The Gnostic Bible: Revised and Expanded Edition

Systematic Theology: Life and the Spirit History and the Kingdom of God

Beyond Belief: The Secret Gospel of Thomas

On the Boundary: An Autobiographical Sketch

Essential Gnostic Scriptures

Becoming Divine: An Introduction to Deification in Western Culture