Joan Frances Casey

Joan Frances Casey is an American author best known for her 1991 memoir *The Flock: The Autobiography of a Multiple Personality*. Written with the assistance of therapist Lynn Wilson, the book chronicles Casey's experience living with Dissociative Identity Disorder (DID) and her journey through treatment. The memoir is notable for its unique narrative structure, presenting perspectives from Casey's various personalities, offering readers an intimate, first-person account of living with multiple identities. *The Flock* became an important work in the field of mental health literature, contributing to public understanding of DID during a period of heightened interest in the condition.