A History of the Study of MPD/DID source: Nancy Burnett. Good up to modern times but takes Sybil case as definitive and fails to note recent evidence it was iatrogenic (therapist-induced)
Multiple Personality Disorder (Dissociative Identity Disorder) by Paul R. McHugh. Prominent Professor of Psychiatry describes how this formerly very rare syndrome came to be common through the direct encouragement of therapists