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

Zealot: The Life and Times of Jesus of Nazareth

Mystics of the Church

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

The Golden Sequence

The Cost of Discipleship

The Grey World

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

Worship

Learning Theology with the Church Fathers

Concerning the Inner Life with the House of the Soul

The Gnostic Bible: Revised and Expanded Edition

Essentials of Mysticism

Beyond Belief: The Secret Gospel of Thomas

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

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

Ruysbroeck

Becoming Divine: An Introduction to Deification in Western Culture

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

Signs of Life: 40 Catholic Customs and Their Biblical Roots