- Celtic Prayers from Iona (1997)
- Echo of the Soul: The Sacredness of the Human Body (2001)
- Christ of the Celts: The Healing of Creation (2008)
- A New Harmony: The Spirit, The Earth, and The Human Soul (2011)
- Praying with the Earth: A Prayerbook for Peace (2011)
- The Rebirthing of God: Christianity's Struggle for New Beginnings (2014)
- Sacred Earth, Sacred Soul: Celtic Wisdom for Reawakening to What Our Souls Know and Healing the World (2021)