This book is planned on the pattern of Robert Graves's Greek Myths and Hebrew Myths. Each section deals with its topic first as presented in legend or story-telling or speculation. Then a commentary discusses the sources, the facts, the underlying ideas, the rehandling in subsequent writing. The time-span of the survey extends from prehistory to the 9th century AD. Geoffrey Ashe has also written King Arthur's Avalon - The Story of Glastonbury, Avalonian Quest and The Ancient Wisdom.