She says that, long before she managed to escape, she was incarcerated in a prison of her own making.
She also experienced the man-made version, on charges including kidnapping and counterfeiting, with drugs and guns thrown in for good measure.
She knew what she was doing, she knew the harm she was inflicting on herself and others, but for a long time she was powerless to do anything about it.
Monday's function will begin in the Banquet Room at Te Ahu at 5.30pm, followed by karakia at 6pm, an introduction by Mayor John Carter and a guest speaker.
Ms Balcombe will speak at 6.25pm, after which people can ask questions and buy her book.