I've recently read an article that makes me want to dig deeper into studying Pelagius and some of the newer scholarship on him, possibly rehabilitating him from the label of heresiarch. I found none of these books to be available in Logos, and would be glad to have any of them:
- Pelagius: Inquiries and Reappraisals by Robert F. Evans (Wipf & Stock, 2010)
- Pelagius: Life and Letters by B. R. Rees (Boydell Press, 1998)
- Pelagius's Commentary on St Paul's Epistle to the Romans (Oxford Early Christian Studies), translated by Theodore De Bruyn (OUP, 1998)
- An Historical Presentation of Augustinism and Pelagianism from the Original Sources by Gustav Friedrich Wiggers (Filiquarian Legacy Publishing, 2012)
- Pelagius's Expositions of Thirteen Epistles of St. Paul: Introduction (Texts and Studies: Contributions to Biblical and Patristic Literature, Volume IX) by Alexander Souter (Wipf & Stock, 2004)
- Pelagius's Expositions of Thirteen Epistles of St. Paul. II: Text and Apparatus Criticus (Texts and Studies: Contributions to Biblical and Patristic Literature, Volume IX) (Wipf & Stock, 2004)
- Pelagius: A Historical and Theological Study by John Ferguson (AMS Press, 1978)
- Pelagius: A Reluctant Heretic by B. R. Rees (Boydell & Brewer, 1991)
- Divine Grace and Human Agency: A Study of the Semi-Pelagian Controversy (Patristic Monograph) by Rebecca Harden Weaver (The Catholic University of America Press, 1996)
- Pelagianism, Semi-Pelagianism & Augustinianism by A. A. Hodge (date?)