Flora Rheta Schreiber

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Flora Rheta Schreiber (April 24, 1918 - November 3, 1993), an American journalist, was the author of the 1973 bestseller Sybil, the story of a woman (identified years later as Shirley Ardell Mason) who was purportedly stricken with Dissociative Identity Disorder. Schreiber had no training in psychiatry and her claim that Mason suffered from Multiple Personality Disorder was later called into question by Dr. Herbert Spiegel when Mason became his patient.

Schreiber also published a book on the burglar, murderer and alleged serial killer Joseph Kallinger, the accuracy of which has also been called into question.