The Catechism of the Catholic Church
The Catechism of the Catholic Church is the authoritative reference book, to be used to proclaim and witness the Good News to all people. The work is subdivided into four parts continuing the long-standing catechetical tradition:
What the Church believes in (first part: the Creed);
celebrates (second part: The Sacraments);
lives (third part : the Commandments);
and prays (fourth part: the Our Father).