In 1990, in a 15th century manuscript kept in the Stadtbibliothek in Mainz, Francois Dolbeau recognized a series of authentic Augustine sermons, some completely unknown until then, others known in brief versions. Five years of work were then necessary for their discoverer to establish the editio princeps, which was published in 1996 in the Collection des Etudes Augustiniennes: Vingt-six sermons au peuple d'Afrique. This second volume of the Sermones Dolbeau is devoted to Sermons 11 to 20. A motivated team of specialists offers here a revised Latin text, an unpublished French translation, an introduction specific to each sermon as well as numerous footnotes and additional notes.