"Sister Ignatia: Angel of Alcoholics Anonymous" by Mary C. Darrah is a compelling self-help book that delves into the life and work of Sister Ignatia, a key figure in the development of Alcoholics Anonymous. Published by Hazelden Publishing in 2001, this 394-page trade paperback offers a captivating read on the religious and social history of substance abuse and addiction. With a focus on twelve-step programs, the book provides valuable insights for those seeking guidance and inspiration in their journey towards recovery.