About Flora Rheta Schreiber:
Flora Rheta Schreiber was the author of the 1973 bestseller Sybil, the story of a woman (identified years later as Shirley Ardell Mason) who had a dissociative identity disorder and allegedly had 16 different personalities. As Mason had insisted on protection of her privacy, Schreiber gave her the cover identity of Sybil Isabel Dorsett.