The Religion of the Ancient Celts/J A MacCulloch. Constable. Hardcover. New edition 1991. Out of print. Condition: Very good. ISBN 0094709300
This classic study was first published in 1911 and portrays the Celt as a seeker after God, linking himself by strong ties to the unseen and eager to conquer the unknown by religious rite and magic art. The earliest aspect of the religion of Celtic man was the cult of nature spirits and of life manifested in nature. Records of this ancient religion are scanty and while valuable hints are provided by early classical documents, more important are the existing folk customs that preserve so much of the old cults.