See this legally free ebook and audiobook:

  • On Christian Doctrine, by Saint Augustine of Hippo, translated by the Prof. J.F. Shaw.
    • The text may be read online on this page of New Advent, from Nicene and Post-Nicene Fathers, First Series, Vol. 2, edited by Philip Schaff (Buffalo, NY: Christian Literature Publishing Co., 1887.), revised and edited for New Advent by Kevin Knight; and at Professor James O’Donnell’s website.
    • The text as originally published is included in: The Works of Aurelius Augustine, a New Translation, edited by the Rev. Marcus Dods, D.D., Vol. IX: On Christian Doctrine: the Enchiridon; on Catechising: on Faith and the Creed (Edinburgh: T. and T. Clark, 1873), available at Internet Archive, whose 3rd edition (Edinburgh: T. and T. Clark, 1892) is available at Internet Archive
    • The text was re-published in: A Select Library of the of the Nicene and Post-Nicene Fathers of the Christian Church, edited by Philip Schaff, D.D., Ll.D., Volume II. St. Augustine’s City of God and Christian Doctrine (Buffalo: Christian Literature Co., 1887), available at Internet Archive, with a 2nd copy at Internet Archive.
    • The audiobook is available at Internet Archive and on Youtube: part 1 and part 2.

On the Feast of St. Bede the Venerable in the Roman Rite. For other texts and ebooks, you may access the List of Free eBooks (Arranged by Title), the List of Free eBooks (Grouped by Subject), the List of Worth-It Catholic Books & eBooks, and the main page of the Catholic eBooks Project.

“And Philip running thither, heard him reading the prophet, Isaias, and he said: Thinkest thou that thou understandest what thou readest? He said: How can I, unless some one shew me?” (Acts viii, 30-31).

“[O]ur most dear brother Paul, according to the wisdom given him, hath written to you, As also in all his epistles, speaking in them of these things: in which are some things hard to be understood, which the unlearned and unstable wrest, as also the other Scriptures, to their own perdition. You therefore, brethren, knowing these things before, beware; lest, being led away by the error of the unwise, you fall from your own steadfastness. But increase in grace, and in the knowledge of our Lord and Saviour, Jesus Christ.” (II St. Peter iii, 15-18)