For my Catholic Friends: Why are books from the Apocrypha used in Catholicism and the Catholic Bible?

Those books have been a part of the bible since the 4th cent. AD. Luther decided to throw them out in the 16th cent AD. We, as Catholics have the fullness of faith, or unabridged Christianity. If you study the shortened version of the reformers, you have the readers digest condensed version, or abridged Christianity. Pax Christi