Arthur's half-sisters, Morgause, Vivian and Morgan, born into witchcraft, are given to Merlin to educate them in the crafts of healing and magic - and to try to intercede in the future he forsees for Arthur. All three women have their part to play: one to help, one to hinder and one to destroy.
Used availability for Mike Ashley's The Enchantresses
January 1998 : UK Hardback
March 1999 : UK Paperback