This volume of the CSEL series presents the first critical edition of the following four pseudo-Augustinian works: De oratione et elemosina (CPPM I 1125); De sobrietate et castitate (CPPM I 1110); De incarnatione et deitate Christi ad Ianuarium (CPPM II 170); Dialogus quaestionum (CPPM II 151). These texts, which were written in Late Antiquity or in the Early Middle Ages, are transmitted in the manuscripts under the name of Saint Augustin. Their influence on intellectual history was considerable, because they were thought to be authentic works of the great Church Father and therefore have been widely read and studied for centuries. These four pseudo-Augustinian texts are concerned with a variety of quite different topics (almsgiving; drinking; Christology; exegesis of the book Genesis); they are of interest for philologists, theologians and historians for a couple of reasons. – Not only does this CSEL volume present the first critical edition of these texts, it also provides their first detailed study according to modern scientific standards. The origin, the content, the sources, and the transmission of these important and partially intriguing texts is fully discussed in the prefaces.