The Church celebrates the feast day of St. Alphonsus de Liguori (Bishop, Moral Theologian, Confessor and Doctor of the Church) on August 1. He is a patron saint of vocations and moral theologians.
Here are some of his writings:
Visits to the Most Holy Sacrament and the Blessed Virgin Mary (St. Alphonsus) – read online; or pdf here
The Holy Eucharist (St. Alphonsus de Liguori) – pdf, text, epub, kindle format
The Holy Mass (St. Alphonsus de Liguori) – pdf, text, epub, kindle format
The Holy Mass (St. Alphonsus de Liguori) – pdf, text, epub, kindle format
The Holy Mass (St. Alphonsus de Liguori) – pdf, text, kindle format
Visits to the Most Holy Sacrament for Every Day of the Month… (St. Alphonsus) – pdf
On the Passion of Jesus Christ (St. Alphonsus de Liguori) – pdf, text, kindle format
The Passion and Crucifixion of Jesus Christ and the Seven Last Words (St. Alphonsus) – pdf, text, kindle
The Passion and the Death of Jesus Christ (St. Alphonsus de Liguori) – pdf, text, kindle; or pdf here
The Love Shown to Us by Jesus in His Passion (St Alphonsus) – audio
The Glories of Mary (St. Alphonsus de Liguori) – pdf, text, kindle format; pdf also here; or audiobook here; audio also here (in various parts)
The Incarnation, Birth, and Infancy of Jesus Christ (St. Alphonsus) – pdf, text, kindle format
The Holy Name of Mary (from The Glories of Mary; St. Alphonsus) – pdf
The Life of St. Alphonsus Maria de Liguori (Fr. A. Tannoja) – pdf, text, kindle format
The Life of St. Alphonsus Maria de Liguori (Fr. A. Carroll) – pdf, text, kindle format
The Life of St. Alphonso Maria de Liguori – pdf: vol. I, vol. II, vol. III, vol. IV, vol. V
The Glories of Mary (St. Alphonsus de Liguori) – pdf, text, kindle format; pdf also here; or audiobook here; audio also here (in various parts)
The School of Christian Perfection (St. Alphonsus) – read online
On the Vice of Impurity (St. Alphonsus) – read online
The Love Shown to us by Jesus in his Passion (St. Alphonsus) – audiobook
Dignity and Duties of the Priest (St. Alphonsus de Liguori) – pdf, text, epub, kindle format
The Divine Office: Explanation of the Psalms and Canticles (St. Alphonsus) – pdf, text, epub, kindle format
The True Spouse of Jesus Christ (St. Alphonsus de Liguori) – pdf
The History of Heresies and Their Refutation (St. Alphonsus) – pdf, kindle format; or pdf here and here
Letters of St. Alphonsus de Liguori – pdf, text, kindle format: part 1, part 2, part 3, part 4
Sermons for All Sundays in the Year (St. Alphonsus de Liguori) – pdf
Sermons upon Various Subjects (St. Alphonsus de Liguori) – pdf
This Is the Mass (Abp. F. Sheen, H. Daniel-Rops) – read online
The History of Heresies and Their Refutation (St. Alphonsus de Liguori) – pdf, text, kindle format
The Divine Office: Explanation of the Psalms and Canticles (St. Alphonsus) – pdf, text, kindle format
The Way of the Cross (St. Alphonsus de Liguori) – pdf (or also here and here latin/english) or audio here or here;
The Seven Sorrows of Mary (St. Alphonsus) – pdf, text, epub, kindle format