See this worth-it book:
- Contra Errores Graecorum [Against the Errors of the Greeks], by St. Thomas Aquinas, O.P., translated by Fr. G.H. Duggan, S.M., and Fr. Peter Damian Fehlner, OFM. Conv. In Ending the Byzantine Greek Schism; Containing: The 14th c. Apologia of Demetrios Kydones for Unity with Rome & the ‘Contra Errores Graecorum’ of St. Thomas Aquinas, edited by James Likoudis (New Rochelle, NY: Catholics United for the Faith, 1992), with Imprimatur, which may be purchased on this page of James Likoudis’ page and at Amazon.
- An incomplete English translation of the first 10 headings of the work, translated by Antoine Valentim, may be read online at the Internet Archive Wayback Machine (linked by Wikipedia).
- The Latin text may be read online on this page of Corpus Thomisticum (linked by Wikipedia).
- [Note 1. Despite the polemical title of the text, it has an irenic tone and content. Rather than directly assailing the ideas of the schismatic Eastern churches, it demonstrates that the pre-Photian sources of Eastern theology affirm the teaching of the Catholic Church on points disputed by the schismatic Eastern churches. See James Likoudis’ essay “St. Thomas Aquinas, Defender of the Papacy and the Unity of the Church”.]
- [Note 2. In his essay “St. Thomas Aquinas, Papal Supremacy, and the Witness of the Eastern Churches in the First Millennium”, James Likoudis discussed objections to St. Thomas’ citations of the Fathers.]
On the feast of Saint Andrew the Apostle in the one true Church. 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. All ye holy Apostles and Evangelists, pray for us!
[Updated 02 September 2020, to replace now-inactive links to free or online texts.]