The book by Sir Thomas Downing Kendrick is dedicated to the priests of the ancient Celts - the Druids. The author examines the history and origins of the formation of popular ideas about this Celtic priesthood and shows their discrepancy with the real picture that emerges from the study of written monuments and archaeological evidence, usually associated with the Druids. As the author demonstrates, one can hardly trust the statements of some particularly ardent adherents of Druidism, who attribute, for example, the Druids with the credit of creating Stonehenge and present their speculations as historical and verified information. The book is rich in factual material that supports the main conclusions and provisions of the author.