We are grateful to our friends at Traditional Catholic for their extensive research in finding the following resources.
The Faith of Our Fathers (Cardinal Gibbons) – pdf, text version; or audio book here
And You Will Know the Truth: How to Explain and Defend the Catholic Faith (S. R. Fama) – pdf, kindle
The Catholic Church Has the Answer (Paul Whitcomb) – read online
The Catholic’s Ready Answer: A Popular Vindication of Christian Beliefs and Practices Against the Attacks of Modern Criticism (Fr. M. P. Hill) – pdf, text, kindle format
The Spirit of Catholicism (Karl Adam) – read online
Catholicism (George Brantl) – read online
The Beauty and Truth of the Catholic Church (Fr. H. von Hurter, E. Jones) – vol. I, vol. II, vol. III, vol. IV, vol. V
The Faith of Catholics, Confirmed by Scripture and Attested by the Fathers (J. Berington, J. Kirk) – pdf, text, kindle format; or enlarged version: volume I, volume II, volume III
The Truths of the Catholic Religion Proved from Scripture Alone – pdf, text, kindle: volume I, volume II
The Belief of Catholics (Fr. Ronald Knox) – download ebook
Catholic Belief (Fr. J. Faa di Bruno) – pdf, text, kindle format
Abridged Course of Religious Instruction, Apologetic, Dogmatic and Moral (Fr. F. X. Schouppe) – read online
A Systematic Study of the Catholic Religion (Fr. Ch. Coppens) – pdf, text, kindle format
The Teaching of the Catholic Church (Fr. G. D. Smith) – (vol. II) pdf, text, kindle format
Christian Apologetics; A Defense of the Catholic Faith (Fr. W. Devivier) – pdf, text, kindle format
A Manual of Apologetics (F. J. Koch) – pdf, text, kindle format
Apologetica: Elementary Apologetics for Pulpit and Pew (Fr. P. A. Halpin) – pdf, text, kindle format
The Threshold of the Catholic Church: A Course of Instructions for Those Entering Her Communion (Fr. John Bagshawe) – pdf, text, kindle format
Early Steps in the Fold: Instructions for Converts and Enquirers (Fr. F. M. De Zulueta) – pdf, kindle format
The Devout Christian (Bp. G. Hay) – pdf
The Sincere Christian (Bp. G. Hay) – pdf
The Treasure of the Church, or, The Sacraments of Daily Life (Fr. J. Bagshawe) – pdf, text, kindle
The Glories of Divine Grace (Fr. E. Nieremberg; M. J. Scheeben) – pdf, text, kindle format
Grace (Fr. Reginald Garrigou-Lagrange) – pdf
Grace and the Sacraments (Fr. Michael Mueller) – pdf, text, kindle format
The Sacraments Explained According to the Teaching and Doctrine of the Catholic Church (Fr. Arthur Devine) – pdf, text, kindle format
These Are the Sacraments (Abp. Fulton Sheen) – pdf
Confession (Fr. John Furniss) – pdf
Catechetical Conferences on Penance as a Virtue and a Sacrament (Bp. J. Lanigan) – pdf, text, kindle format
The Abiding Presence of the Holy Ghost in the Soul (Fr. B. Jarrett) – pdf
The Supernatural Life of the Soul on Earth and in Heaven (Fr. A. Devine) – pdf, text, kindle format
The Mother of Christ: or, The Blessed Virgin Mary in Catholic Tradition, Theology, and Devotion (Fr. O. R. Vassall-Phillips) – pdf, text, kindle format
A Catholic Response to Protestant Objections Concerning the One True Church
Which Is the True Church? (C. F. B. Allnatt) – pdf, text, kindle format
The Chief Points of Difference Between the Catholic and Protestant Creeds (Fr. F. Laun) – pdf, kindle
A Doctrinal Catechism (Rev. Stephen Keenan) – pdf (addressed to Protestants, demonstrating the truths of the Faith)
Radio Replies in Defence of Religion – read online (great Catholic answers for Protestants)
Answers to a Jewish Enquirer (Fr. Theodore Ratisbonne) – pdf, text, kindle format
Where We Got the Bible: Our Debt to the Catholic Church (Rev. H. Graham) – read online
Which Bible Should You Read (Thomas A. Nelson) – pdf (download starts instantly)
The Exercise of Faith Impossible Except in the Catholic Church (W. G. Penny) – pdf, text, kindle
Familiar Explanation of Christian Doctrine (Fr. Michael Mueller) – read online
The Commandments Explained (Fr. Arthur Devine) – pdf, text, kindle format
The Creed Explained (Fr. Arthur Devine) – pdf, text, kindle format
The Sacrifice of the Mass (Fr. M. Gavin) – read online; or audiobook here
The Holy Mass (St. Alphonsus de Liguori) – pdf, text, kindle format
The Holy Eucharist (St. Alphonsus de Liguori) – pdf, text, kindle format
The Blessed Sacrament, or, The Works and Ways of God (Fr. F. G. Faber) – pdf, text, kindle format
The Blessed Sacrament: Preparation, Attendance, Giving of Thanks, Spiritual Communion (Fr. F. G. Faber) – pdf, text, kindle
The Blessed Eucharist, Our Greatest Treasure (Fr. M. Mueller) – pdf, text, kindle format
The Bread of Life, or, St. Thomas Aquinas on the Adorable Sacrament of the Altar – pdf, text, kindle format
The Real Presence of the Body and Blood of Our Lord Jesus Christ in the Blessed Eucharist, Proved from Scripture (Cardinal Wiseman) – pdf, text, kindle format
The Catholic Doctrine of the Eucharist: Demonstrably Proved from Scripture, from Tradition and from the Writings… (M. D. Talbot) – pdf, text, kindle format
Visits to Jesus in the Tabernacle (Fr. F. X. Lasance) – pdf
The Priest: His Dignity and Obligations (St. John Eudes) – pdf
The Eternal Priesthood (Cardinal Manning) – read online
Providence (Fr. Reginald Garrigou-Lagrange) – read online
Life Everlasting (Fr. Reginald Garrigou-Lagrange) – read online
The Future Life (Fr. J. C. Sasia) – pdf, text, kindle format
The Last Things (Abbe A. Michel) (death, judgement, heaven, hell) – read online
The Four Last Things (Fr. Martin von Cochem) – read online; or pdf, kindle format here
Purgatory, Illustrated by the Lives and Legends of the Saints (Fr. Francois Xavier Schouppe) – pdf, text, kindle format
Hell (Fr. F. X. Schouppe) – read online
Eternal Punishment (Fr. J. P. Arendzen) – pdf
Sin and Its Consequences (Cardinal Manning) – audiobook
The Love of Jesus to Penitents (Card. Manning) – audiobook (on confession)
Thoughts on Great Mysteries (Fr. F. G. Faber) – pdf, text, kindle format
Precious Blood, or, The Price of Our Salvation (Fr. F. G. Faber) – pdf, text, kindle format
The Divinity of Christ (Fr. J. Rickaby) – pdf, text, kindle format
Witnesses to Christ (Abp. Alban Goodier) – pdf
Christ in the Church (Mons. Robert Hugh Benson) – pdf, text, kindle format
The Creator and the Creature, or, The Wonders of Divine Love (Fr. F. G. Faber) – pdf, text, kindle
The Holy Ghost, the Sanctifier (Cardinal Manning) – pdf, text, kindle format
The Temporal Mission of the Holy Ghost (Cardinal Manning) – pdf, text, kindle format
The Trinity and God the Creator (Fr. R. Garrigou-Lagrange) – read online
Christ the Savior (Fr. R. Garrigou-Lagrange) – pdf
The Glories of the Sacred Heart (Cardinal Manning) – pdf, text, kindle format
The Brown Scapular: A Sign of Salvation and Protection – pdf
The Evidence for the Papacy (Colin Lindsay) – pdf, text, kindle format
St. Peter, Bishop of Rome, or, The Roman Episcopate of the Prince of the Apostles (Fr. T. S. Livius) – pdf
St. Peter, His Name and His Office; The See of St. Peter (both by T. W. Allies)
Cathedra Petri: or, The Titles and Prerogatives of St. Peter, and of His See and Successors; as Described by the Early Fathers, and Councils of the Church (C. F. B. Allnatt) – pdf, text, kindle
A Commentary by Writers of the First Five Centuries on the Place of St. Peter in the New Testament, and That of His Successors in the Church (Fr. J. Waterworth) – pdf, text, kindle format
A Treatise on the Church (Fr. H. Klee) – pdf, text, kindle format
The Church (A. G. Sertillanges) – pdf, text, kindle format
The History of Heresies and Their Refutation (St. Alphonsus de Liguori) – pdf
Moral Briefs: A Concise Exposition of Catholic Morals (Fr. J. H. Stapleton) – pdf, text, kindle format