Q. 1. What is the purpose of the Catechism of the Catholic Church?
A. 1. A provisional, "reference text" was issued by Pope John Paul II on October 11, 1992. On August 15, 1997, Pope John Paul II promulgated the Latin typical edition. Therefore, the 2nd Edition of the Catechism of the Catholic Church is the official English language Catechism for the Catholic Church.
Other Catechisms and the Compendium of the Catholic Church serve as aids, usually to simplify one's understanding of the official Catechism (its teachings).
The word "catechism," originating from ancient Greek usage, is a summary and exposition of doctrines.
For those seeking information on the teachings of the Catholic Church, the Catechism of the Catholic Church is the book one should read. It has an comprehensive index to a multitude of topics.