Blanche Barton (born Sharon Densley) is Magistra Templi Rex within the Church of Satan, and is addressed by Satanists as Magistra Barton. She is Anton LaVeys biographer and mother of LaVeys son Satan Xerxes Carnacki LaVey born 1993. Barton wrote The Church of Satan: A History of the World's Most Notorious Religion (1990) and The Secret Life of a Satanist: The Authorized Biography of Anton LaVey (1990).