The mythology of the ancient Celts is a rich and complex one. Celtic myths relate epic stories of heroic ancestors, when the divine and mortal realms were intimately intertwined and gods and goddesses inhabited the natural world. The exploits of Cúchulainn and Fionn mac Cumhaill, of Deirdre and Rhiannon, and of other heroes and heroines may have their roots in the distant past but they continue to...