Mystics of the Church

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

Mysticism: A Study of the Nature and Development of Man's Spiritual Consciousness

Zealot: The Life and Times of Jesus of Nazareth

The Golden Sequence

The Cost of Discipleship

The Grey World

Essential Gnostic Scriptures

Worship

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

Concerning the Inner Life with the House of the Soul

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

Essentials of Mysticism

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

Then May the Senses Fall: Evelyn Underhill’s Forgotten Fiction

Learning Theology with the Church Fathers

Ruysbroeck

The Gnostic Bible: Revised and Expanded Edition

Jacopone da Todi: Poet and Mystic (1228-1306): A Spiritual Biography

Beyond Belief: The Secret Gospel of Thomas