The Catechism of the Catholic Church (CCC) is the official doctrinal presentation of the Roman Catholic Church in a wide variety of topics. It was first published in French in 1992 and was authorized by Pope John Paul. Since then, it has been translated into many languages. An online version can be found at scborromeo.org/ccc.htm.
The Catechism is arranged by topic with paragraphs being numbered consecutively.