Evans-Wentz, W. Y., The Fairy Faith in Celtic Countries (NY: Citadel Press, 1990)

Ó hÓgáin, Dáithi, Myth, Legend, and Romance: An Encyclopaedia of Irish Folk Tradition (NY: Prentice Hall, 1991)

* Owen, Trefor M., A Pocket Guide: The Customs and Traditions of Wales (Cardiff: University of Wales Press, 1991)

Skelton, Robin and Margaret Blackwood, Earth, Air, Fire, Water: Pre-Christian and Pagan Elements in British Songs, Rhymes and Ballads (London: Arkana, 1991)

Caesar, Julius, The Gallic War, tr. by H. J. Edwards (Cambridge MA: Harvard University Press, 1994)

Chadwick, Nora, The Celts (NY: Penguin, 1991)

* Cunliffe, Barry W., The Ancient Celts (Oxford: Oxford University Press, 1997)

Cunliffe, Barry W., The Celtic World (NY: St. Martin's Press, 1993)

* Danaher, Kevin, The Year in Ireland (Irish Books & Media, 1994)

Ellis, Peter Berresford, The Celtic Empire (London: Constable, 1990)

Ellis, Peter Berresford, The Druids (Grand Rapids MI: Eerdmans, 1995)

* Green, Miranda, The World of the Druids (NY: Thames & Hudson, 1997)

Hutton, Ronald, The Pagan Religions of the Ancient British Isles (Cambridge: Blackwell, 1995)

* James, Simon, The World of the Celts (NY: Thames & Hudson, 1993)

Koch, John and John Carey, The Celtic Heroic Age: Literary Sources for Ancient Celtic Europe and Early Ireland and Wales (Malden MA: Celtic Studies Publications, 1995)

Merrifield, Ralph, The Archaeology of Ritual and Magic (NY: New Amsterdam Books, 1988)

Piggott, Stuart, The Druids (NY: Thames & Hudson, 1986)

Raftery, Barry, Pagan Celtic Ireland (NY: Thames & Hudson, 1994)

Ross, Anne, Pagan Celtic Britain (Chicago: Academy Chicago, 1996)

Ross, Anne, The Pagan Celts (Totowa NJ: Barnes & Noble, 1986)

Ross, Anne and Don Robins, The Life and Death of a Druid Prince (NY: Touchstone, 1991)

Kelly, Fergus, Guide to Early Irish Law (Dublin: Dublin Institute for Advanced Studies, School of Celtic Studies, 1988)

Dames, Michael, Mythic Ireland (NY: Thames & Hudson, 1996)

Davidson, Hilda Ellis, The Lost Beliefs of Northern Europe (London: Routledge, 1993) (Note: it focuses more on the Germans than the Celts, but has an excellent chapter on Celtic Goddesses.)

Davidson, H. R. Ellis, Myths and Symbols in Pagan Europe (Syracuse NY: Syracuse University Press, 1988)

Ellis, Peter Berresford, Dictionary of Celtic Mythology (Oxford: Oxford University Press, 1994)

Ellis, Peter Berresford, A Dictionary of Irish Mythology (Oxford: Oxford University Press, 1991)

Enright, Michael, Lady With a Mead Cup (Four Courts Press Ltd., 1996)

* Green, Miranda, Dictionary of Celtic Myth and Legend (NY: Thames & Hudson, 1992)

Green, Miranda, The Gods of the Celts (Dover NH: Alan Sutton, 1993)

Green, Miranda, Symbol and Image in Celtic Religious Art (NY: Routledge, 1992)

MacCana, Proinsias, Celtic Mythology (London: Hamlyn, 1970)

Matthews, Caitlín and John, The Encyclopedia of Celtic Wisdom (Totowa NJ: Barnes & Noble, 1996)

McNeill, F. Marian, The Silver Bough (Edinburgh: Canongate, 1995)

Nagy, Joseph Falaky, The Wisdom of the Outlaw (Berkeley: University of California Press, 1985)

* Rees, Alwyn and Brinley, Celtic Heritage (NY: Thames & Hudson, 1994)

Rolleston, T. W., Celtic Myths and Legends (NY: Dover, 1990)

* Sjoestedt, Marie-Louise, Gods and Heroes of the Celts, tr. by Myles Dillon (Berkeley: Turtle Island Books, 1994)

* Ancient Irish Tales, ed. by Tom P. Cross and Clark Harris Slover (Totowa NJ: Barnes & Noble, 1996)

Cath Maige Tuired: Second Battle of Mag Tuired, ed. and tr. by Elizabeth A. Gray (Dublin: Irish Texts Society, 1983)

* Early Irish Myths and Sagas, tr. by Jeffrey Gantz (NY: Penguin, 1986)

Lebor Gabála Erenn: Book of the Taking of Ireland (5 vols.), ed. and tr. by R. A. S. Macalister (Dublin: Irish Texts Society, 1938-56)

* The Mabinogion, tr. by Jeffrey Gantz (Viking, 1976)

* The Táin, tr. by Thomas Kinsella (Oxford: Oxford University Press, 1983)

* Kondratiev, Alexei, The Apple Branch: A Path to Celtic Ritual (Cork: Collins Press, 1998)

* Laurie, Erynn Rowan, A Circle of Stones (Chicago: Eschaton, 1995)

Cowan, Tom, Fire in the Head (San Francisco: HarperCollins, 1993)

Littleton, C. Scott, The New Comparative Mythology (Third Edition) (Berkeley: University of California Press, 1982)

Puhvel, Jaan, Comparative Mythology (Baltimore: The Johns Hopkins University Press, 1987)

Mallory, J. P., In Search of the Indo-Europeans (NY: Thames & Hudson, 1989)