Bonewits, Isaac. Bonewits’s Essential Guide to Druidism. New York: Citadel Press, 2006.
D’Este, Sorita and David Rankine. Visions of the Cailleach. London: Avalonia, 2009.
Ellison, Robert Lee (Skip). The Solitary Druid: Walking the Path of Wisdom and Spirit. New York: Citadel Press, 2005.
Freeman, Mara. Kindling the Celtic Spirit: Ancient Traditions to Illumine Your Life Throughout the Seasons. New York: Harper One, 2000.
Green, Miranda G. Dictionary of Celtic Myth and Legend. London: Thames and Hudson, 1992.
Hutton, Ronald. The Stations of the Sun: A History of the Ritual Year in Britain. Oxford: Oxford University Press, 1996.
Rees, Alwyn and Brinley Rees. Celtic Heritage: Ancient Tradition in Ireland and Wales. London: Thames and Hudson, 1961, reprinted 1995.
Grey Wren's Flight 