- My Life in God: The Diaries of George MacDonald (2006)
- The Celtic World (2006)
- Saints, Signs and Symbols: The Secret Language of the Saints (2008)
- The Book of Blessings (2008)
- The Celtic Book of Days: A Treasury of Ancient Celtic Wisdom and Traditions (2011)
- The Story of Celtic Christianity: From the First Believers to the Celtic Revival Today (2013)
- The Spiritual Life: A Guide to Christian Practices for Today (2014)
- Celtic Wisdom for Every Day (2014)
- The Celtic Prayer Book (2015)
- The Meaning of the Celtic Cross: Symbol of Christ's Victory Over Death (2016)
- Celtic Psalms (2017)
- The Celtic Hymnal: A Treasury of Ancient Celtic Christian Hymns and Chants (2018)
- The Celtic Book of Spells: Ancient Charms, Cures and Talismans (2019)
Articles
- "The Spirituality of the Celts" (2006)
- "Celtic Christianity: A Brief History" (2007)
- "The Celtic Cross: Symbol of Christ's Victory Over Death" (2008)
- "The Meaning of the Celtic Knot" (2009)
- "Celtic Wisdom for Every Day" (2010)
- "The Celtic Prayer Book" (2011)
- "The Spiritual Life: A Guide to Christian Practices for Today" (2012)
- "Celtic Psalms" (2013)
- "The Celtic Hymnal: A Treasury of Ancient Celtic Christian Hymns and Chants" (2014)
- "The Celtic Book of Spells: Ancient Charms, Cures and Talismans" (2015)
Other
- The Celtic Calendar (2007)
- The Celtic Art of Meditation (2008)
- The Celtic Book of Prayers and Blessings (2009)
- The Celtic Book of Wisdom (2010)