The Center for Celtic Spirituality – This site considers the compatible overlap between pre-Christian and Christian beliefs.
Megalithic Ireland – A wonderful source of descriptions and locations of various megalithic sites, such as stone circles, high crosses, forts, and wells. The site can also be searched by county.
Thin Places – An incredibly informative blog by Mindie Burgoyne, this site provides detailed information about sites to visit. Burgoyne also offers tours and trips to various thin places in Ireland.
Celtic Spirit: A Wee Journey to the Heart of it All by Jeanne Crane (2013) – This fictional account of a trip to several sacred places in Ireland is told from the perspective of the tour guides and the participants. Crane weaves in relevant Celtic traditions throughout the book. An easy, enjoyable read for someone new to Celtic concepts.
Visiting the Thin Places of Celtic Ireland by Jeanne Crane (2013) – Short article outlining several sacred sites in Ireland. While not comprehensive, it is a good introduction.
IRELAND: Mythical, Magical, Mystical: A Guide to Hidden Ireland by Christy Nicholas (2013) – A clever, applicable little book about many off-the-beaten path locations – along with some practical travel advice.
Anam Cara: A Book of Celtic Wisdom by John O’Donohue (2009) – Anam Cara or “soul friend,” is probably John O’Donohue’s most famous book. The late O’Donohue from County Clare was a priest, writer, and poet whose powerful prose considers what it means to be truly human. I highly recommend this book.
Eternal Echoes: Celtic Reflections on Our Yearning to Belong by John O’Donohue (2000) – Another gem from O’Donohue that examines relationships, life, and spirituality.
Four Elements: Reflections on Nature by John O’Donohue (2011) – This book provides a beautiful, thoughtful discussion of nature’s beauty and strength. The chapters are organized by air, water, fire and stone/earth. This book was published after his death, but was one of O’Donohue’s first set of writings.
Water, Wind, Earth, and Fire: The Christian Practice of Praying with the Elements by Christine Valters Paintner (2010) – A lovely, rich book that blends the spirituality of nature with prayer.