Mackenzie Phillips stops by the Today show in this September 24 video clip to talk about her new autobiography, “High on Arrival.” Mackenzie Phillips talks about the incestuous relationship with her father, her history of drug abuse, and the screwed up childhood that continued into adulthood.

Yesterday, Mackenzie Phillips sat down with Oprah to reveal the family secret that her father, John Phillips, raped her on the eve of her wedding day.