"A Brief History of the Druids" by Peter Berresford Ellis

"Ancient Mysteries of Britain" by Janet & Colin Bord

"Cunning Folk and Familiar Spirits: Shamanistic Visionary Traditions in Early Modern British Witchcraft and Magic" by E. Wilby

"The Cunning Man" by Celia Rees

"Dictionary of Celtic Myth and Legend" by Miranda K. Green

"Pagan Celtic Britain: Studies in Iconography and Tradition" by Anne Ross

brythonwitch:

"The Cunning Man" by Celia Rees

Started, read and finished during a four hour traffic jam outside the Blackwall Tunnel.  Will post a review when I get a chance.