In Ciceronis Topica and De topicis differentiis are Boethius's two treatises on Topics (loci). Together these two works present Boethius's theory of the art of discovering arguments, a theory that was highly influential in the history of medieval logic. Eleonore Stump here presents the first English-language translation of In Ciceronis Topica. Noteworthy as a dialectical text, In Ciceronis Topica is also a rich storehouse of information on Stoic logic and Roman law and rhetoric, as well as on Boethius himself and the thought and culture of his period. Stump's Introduction supplies essential information about In Ciceronis Topica, Boethius's life, and the tradition of dialectic; her detailed notes explore the many philosophical problems in Boethius's text.