Nicene and Post-Nicene Fathers, Series I, Vol. III
St. Aurelius Augustine
ON THE TRINITY
On the Catechising of the Uninstructed
A Treatise on Faith and the Creed.
Concerning Faith of Things Not Seen
On the Profit of Believing.
On the Creed: a Sermon to the Catechumens.
On the Good of Marriage.
Of Holy Virginity.
On the Good of Widowhood
Of the Work of Monks.
On Care to Be Had for the Dead.
Website by C.J.S. Hayward, who has a very interesting bookshelf. A little curious about his own books? The Angelic Letters and Doxology are both included in C.J.S. Hayward in Under 99 Pages. You may be very interested in the Classic Orthodox Bible.