The Fall Of Atlantis - Marion Zimmer Bradley - Bog

A wounded Atlantean prince washed up on a foreign shore becomes the focal point in an epic battle between good and evil when the full extent of his powers becomes known. Caught inbetween are the sisters Deoris and Domaris, whose lives are drawn into a web of sorcery conjured by the priests - the same sorcery which will cause the fall of Atlantis.