This fascinating book offers twelve chapters by experts in the field of Celtic mythology—from myth and the medieval to comparative mythology and the new cosmological approach. offers a wide range of innovative research that leads readers on an adventure through the wonders of Celtic history: the possible use of hallucinogenic mushrooms in ancient Ireland to the mental mapping in the interpretation of the Irish legend . It also looks at the modern integration of established scholarship with new findings that have recently emerged at the Indo-European level; these developments have the potential to open up the whole field of mythology in a new way. An exciting addition to existing scholarship, is the first book to offer a view of Celtic mythology as the reflection of a prehistoric state that it is possible to recover through integrated cosmological enquiry.