This catalog is organized into three sections, each devoted to a speciﬁc aspect of the composer’s creative work. The ﬁrst offers an inventory of Ginastera’s numbered and unnumbered compositions. Although previous workslists have focused primarily on those pieces with opus numbers that Ginastera had included within his ofﬁcial catalog of works, this chapter chronologically groups the composer’s numbered and unnumbered works together. The rationale for this decision is that many unnumbered compositions represent signiﬁcant artistic achievements that bear close relationships to the ofﬁcially numbered works that surround them. By viewing the catalog chronologically as a whole, the reader uncovers unforeseen connections and gains insights into the composer’s creative process.