Catholic Apologetics: A Course in Religion – Book IV, is a 134 page paperback book by Rev. Fr. John Laux M.A.. Suggestions for Study. One of the best apologetics books we have ever seen. Covers the nature of our knowledge, justifications for our belief, proofs for the existence of God, Immortality of the soul, proofs of Revelation, reasonableness of our belief in the Church, primacy of the Pope, etc.