Suggested Reading A Sampling of Good Catholic Books and a link to read Catholic Books free on line. Link for reading Catholic Books free on Line. http://www.traditionalcatholic.co/free-catholicbooks/ The Catechism Explained by Rev. Francis Spirago The Mass. A Study of The Roman Liturgy The Sources of Catholic Dogma by Denzinger Fundamentals of Catholic Dogma by Ludwig Ott The Douay Holy Bible with commentary supplied by Fr. Leo Haydock A Commentary on The Book of Psalms Translated from the Latin of St. Robert Bellarmine.