- Christ in All Things: Exploring Spirituality with Teilhard de Chardin (1997)
- Spirit of Fire: The Life and Vision of Teilhard de Chardin (1998)
- Pierre Teilhard de Chardin: Writings Selected with an Introduction by Ursula King (1999)
- Christian Mystics: Their Lives and Legacies throughout the Ages (2001)
- The Search for Spirituality: Our Global Quest for a Spiritual Life (2008)
- Teilhard de Chardin and Eastern Religions: Spirituality and Mysticism in an Evolutionary World (2011)