[sdegutis]

That's the beauty of the Catholic Church: there is purity of belief. There is a core set of things that all Catholics absolutely must believe, and any who do not, are not truly Catholics. These beliefs are laid down in many different ways and in many different books but they're all saying the same thing. The "table of contents" of these beliefs would be a book called the Catechism of The Catholic Church: http://www.vatican.va/archive/ENG0015/_INDEX.HTM Even though it's a full book of its own, it only barely touches on the core beliefs of our religion, like a tree trunk. The branches go very far and very wide, and you'll find them in all the writings of the Saints, all the writings of the Fathers of the Church, the Catholic Encyclopedia, the Bible, and many other good books. A good portion of them are laid down for free online at http://www.newadvent.org/cathen/index.html which has the Catholic Encyclopedia, Summa Theologica (Summary of Theology), many writings of the Fathers of the Church, the Bible, and many other Catholic Church documents such as Papal encyclicals.