St. Augustine of Hippo 
St. Augustine’s Writings Against The Manichaeans And Against The Donatists [EPUB ebook] 

This edition contains the following writings:
Of the Morals of the Catholic Church.
On the Morals of the Manichaeans.
Concerning Two Souls, Against the Manichaeans.
Acts or Disputation Against Fortunatus, the Manichaean.
Against the Epistle of Manichaeus Called Fundamental.
Reply to Faustus the Manichaean.
Concerning the Nature of Good, Against the Manichaeans.
On Baptism, Against the Donatists
In Answer to the Letters of Petilian, the Donatist, Bishop of Cirta.
A Treatise Concerning the Correction of the Donatists