This book was developed By several Recovering alcoholics while working with the Big book from 1939 to 1946. it was published by Ed Webster. One of the dozen key men in the early development of the 12 steps. It was sold by A.A. Headquarters until 1954, When it was replaced by Bill W's 12 steps and 12 traditions. It is still used today as a straight forward easy to follow guide for working the 12 Steps. Dr Bob encouraged many to use this and endorsed it