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

The Desert Fathers: Sayings of the Early Christian Monks

Mystics of the Church

The Templars: The Rise and Spectacular Fall of God's Holy Warriors

Fragments from an Inner Life: The Notebooks of Evelyn Underhill

Dominion: The Making of the Western Mind

Evelyn Underhill's Prayer Book

Saints and Sinners: A History of the Popes; Fourth Edition

Worship

Thomas Becket: Warrior, Priest, Rebel, Victim: A 900-Year-Old Story Retold

Concerning the Inner Life with the House of the Soul

Bonhoeffer: Pastor, Martyr, Prophet, Spy

Essentials of Mysticism

Strange Fire: The Danger of Offending the Holy Spirit with Counterfeit Worship

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

They Like Jesus but Not the Church: Insights from Emerging Generations

Ruysbroeck

A History of Christianity: The First Three Thousand Years

The Grey World

The Confessions