The Spiritual Life: A Treatise on Aesthetical and Mytical Theology, Rev. Adolphe Tanquerey, S.S., D.D., 1923
The Spirit of Sacrifice and the Life of Sacrifice in the Religious State, S.M. Giraud and Herbert Thurston [pdf]
The Practice of Christian and Religious Perfection Vol I, Father Alphonsus Rodriquez, S.J.
Baltimore Catechism of 1891, The Catholic Primer, 2005 [text]
Catechism of the Council of Trent (also known as; "The Catechism of Pius V")
Catholic Encyclopedia, 1917, newadvent.org [link]
Theology of the Body, Bl. John Paul II
Love and Responsibility, Bl. John Paul II (Karol Wojtyla), Ignatius Press
The True Spouse of Jesus Christ, Saint Alphonsus De Ligouri, Benziger Brothers, 1888
Padre Pio: The True Story, C. Bernard Ruffin, Our Sunday Visitor, 1991
Letters of Padre Pio (to his spiritual children) Vol. I - IV, Padre Pio
The Priest is Not His Own, Archbishop Fulton J. Sheen
Secrets of a Soul, The Letters of Padre Pio to his Spiritual Fathers
Letters of Saint Teresa of the Andes, Saint Teresa of the Andes
Collected Works of Saint Teresa of Avila, Vol III, Kieran Kavanaugh and Otilio Rodriguez, ICS Publications, 1985
Ascent of Mount Carmel, Saint John of the Cross, Kieran Kavanaugh and Otilio Rodriguez, ICS Publications
Mystical City of God (Popular Abridgment), Ven. Mary of Agreda, Blue Army of Our Lady of Fatima, 1993 [text]
The Cure D'Ars, St. Jean-Marie Baptiste Vianney, Abbe Francis Trochu, Tan Books, 1927
Diary of Saint Faustina, Saint Faustina, Marians of the Immaculate Conception, 1998
Introduction to the Devout Life, Saint Francis De Sales
Confessions, Saint Augustine, Albert C. Outler, Ph.D., D.D.
Poem of the Man-God*, Maria Valtorta [defense] *used for reference only