Childline was launched 25 years ago, the first national helpline for children in the world. With it came a revolution in child protection. Here, founder Esther Rantzen tells the stories of some of those whose lives have been transformed by the charity, including that of Jo who was one of the 50,000 children who rang on the first night. She also details landmark events, cases and helpers, in a book that is inspiring and uplifting, although the individual stories are themselves disturbing.