She was born in Warren, Ohio, but moved to the San Francisco Bay Area when she was eighteen months old. She was a student of English, receiving a teaching certificate. While teaching English in the public school system, she completed an advanced degree in psychology.
Her first published novel was A Great Deliverance in 1988, featuring Thomas Lynley, Lord Asherton, a Scotland Yard inspector of noble birth; Barbara Havers, Lynley's assistant, from a very working-class background; Lady Helen Clyde, Lynley's girlfriend and later wife, of noble birth as well; and Lynley's friends Simon and Deborah St. James.