- For the core of Catholic philosophy
Thomas Aquinas in 50 pages: The Layman’s Quick Guide to Thomism by Taylor Marshall, 2014, Saint John Press
Confessions by Saint Augustine, originally in Latin, translated by many, I personally have read the Penguin Classic translated by R.S. Pine-Coffin into English. It has been translated to many languages around the world and I know for a fact that it has at least been translated into Korean though I am not sure of the quality of the translation since I am not fluent in Korean.
- For Justification for Holy Tradition as transmitted in the mass and through the Church by the apostles
Tradition and the Church by Msgr. George Agius, 2005, Tan Book Publishers, Rockford IL
- The doctrines of the Church in a nutshell
What Catholics Believe, by Rev. Lawrence G. Lovasik, 1977, by Tan Book Publishers, Rockford Il
- Holy Scripture translated from the Latin Vulgate into English
The Douey-Rhiems translation of the Holy Bible., 2009, Saint Benedict Press & Tan Books (there are more than one including one with both original Latin and English translation By Baronius Press 2013)