This wide-ranging book contains twelve chapters by scholars who explore aspects of the fascinating field of Celtic mythology - from myth and the medieval to comparative mythology, and the new cosmological approach. Examples of the innovative research represented here lead the reader into an exploration of the possible use of hallucinogenic mushrooms in Celtic Ireland, to mental mapping in the interpretation of the Irish legend Tain Bo Cuailgne, and to the integration of established perspectives with broader findings now emerging at the Indo-European level and its potential to open up the whole field of mythology in a new way.