Cillain Keyes Himself regularly Interviewed Milligan during his treatment and conferred with his carers. I'm only reading it now but It seems to be a fair portrayal. at times shocking but not in a way one might suspect of being overdrawn. Excellent book, would highly suggest if at all interest.
Tristan Black Wolf I concur with Cillain's answer. My BA was in psych, and I took 18 grad hours afterward. My impression is of a storyteller's highly-accurate description of events, emotions, memories, and therapy. Although the events were "sensational," the narrative treats it with an even hand and a view toward accuracy rather than sensationalism. An excellent read.