Marion Zimmer Bradley. The Inheritor (1984) 414 pp. [pbo]
Publishers description: Leslie Barnes has just bought her first home, overlooking San Franciscos Golden Gate Bridge. It seems the perfect place for Leslie and her sister, a brilliant young musician. But, as soon as they move in, a plague of dark events begin, unsettling both women. To her horror, Leslie realizes that she is living in a vortex of magickal power. She must become the guardian of that power and protect it from those who seek to use it for evil. Trained as a psychologist, Leslie is in over her head when dealing with the occult—until she meets Claire Moffatt, a charming medium, and Claires mentor, Colin MacLaren, world-famous psychic investigator. Together they stand against evil and enable Leslie to claim her full inheritance.
Setting: San Francisco