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

The Cost of Discipleship

The Golden Sequence

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

The Grey World

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

Worship

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

Concerning the Inner Life with the House of the Soul

Learning Theology with the Church Fathers

Essentials of Mysticism

The Gnostic Bible: Revised and Expanded Edition

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

Beyond Belief: The Secret Gospel of Thomas

Ruysbroeck

Essential Gnostic Scriptures

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

Becoming Divine: An Introduction to Deification in Western Culture