Celtic Christianity and Climate Crisis Twelve Keys for the Future of the Church Simpson, Ray Heftet / 2020 / Engelsk
Brendan's Return Voyage: A New American Dream Indigenous, Post-Colonial, and Celtic Theology Simpson, Ray Innbundet / 2021 / Engelsk
Celtic Book of Days Ancient Wisdom for Each Day of the Year from the Celtic Followers of Christ Simpson, Ray Heftet / 2020 / Engelsk
Dance of Creation Celtic Prayers of Celebration and Insight, Repentance and Restoration Simpson, Ray Heftet / 2023 / Engelsk
Paths of Justice Celtic Prayers for a World of Equity, Unity, and Healing Simpson, Ray Heftet / 2023 / Engelsk
Brendan's Return Voyage: A New American Dream Indigenous, Post-Colonial, and Celtic Theology Simpson, Ray Heftet / 2021 / Engelsk
Soul Friendship in the Celtic Tradition Ancient Insights for Today Simpson, Ray Heftet / 2022 / Engelsk
Propagation by Budding with Special Reference to the Cherry Simpson, Ray Clinton Heftet / 2013 / Engelsk
Propagation by Budding With Special Reference to the Cherry Simpson, Ray Clinton Heftet / 2025 / Engelsk
Propagation by Budding With Special Reference to the Cherry Simpson, Ray Clinton Innbundet / 2025 / Engelsk
St Aidan's Way of Mission Celtic insights for a post-Christian world Simpson, Ray Heftet / 2016 / Engelsk
