THE OLD AND NEW TESTAMENTS of the Holy Bible constitute the Sacred Scriptures for Catholics. These are the canonical Books judged by the Church's teaching authority as having been written under a special inspiration of God the Holy Spirit. The Catholic Bible as we know it now was definitively set by the end of the 4th Century A.D.
"It is a fact of history that the Council of Carthage, which was held in 397 A.D., mainly through the influence of St. Augustine, settled the Canon or Collection of New Testament Scriptures as we Catholics have them now, and decreed that its decision should be sent on to Rome for confirmation. No Council (that it is, no gathering of the Bishops of the Catholic Church for the settlement of some point of doctrine) was ever considered to be authoritative or binding unless it was approved and confirmed by the Roman Pontiff, whilst the decisions of every General Council that has received the approval of Rome are binding on the consciences of all Catholics. The Council of Carthage, then, is the first known to us in which we find a clear and undisputed catalogue of all the New Testament books as we have them in the Bible now."
-Rt. Rev. Henry G. Graham Where, We Got the Bible: Our Debt to the Catholic Church