The Catechism of the Catholic Church (CCC) is an official text of the Catholic Church, summarizing its key principles and teachings. Pope John Paul II shared in his Apostolic Constitution titled Fidei Depositum (Deposit of Faith) some of the intentions behind the text:

“A catechism should faithfully and systematically present the teaching of Sacred Scripture, the living Tradition of the Church and the authentic Magisterium, as well as the spiritual heritage of the Fathers and the Church’s saints, to allow for a better knowledge of the Christian mystery and for enlivening the faith of the People of God. It should take into account the doctrinal statements which down the centuries the Holy Spirit has intimated to his Church. It should also help illumine with the light of faith the new situations and problems which had not yet emerged in the past.”

This same constitution ordered the publication of the Catechism of the Catholic Church. Further material can be found as follows:

Vatican

• The Fidei Depositum
• Vatican Archives: Catechism of the Catholic Church

Wikipedia

• A Wikipedia article on the Fideo Depositum
• A Wikipedia article on the Catecishm of the Catholic Church
• A Wikipedia article on teachings of Pope John Paul II has a section on the Catechism.

• The United States Conference of Catholic Bishops (USCCB) has the text published on the web: old.usccb.org/catechism/text