The Masterwork in Music: (1930) offers a deep dive into the theoretical and philosophical writings of Heinrich Schenker, focusing on his analyses of musical compositions. This volume, the third and final in the series, presents a comprehensive exploration of Schenker's thought, encompassing detailed musical analyses, broader discussions on music theory within historical and cultural frameworks, and general reflections on music, art, and culture. It is particularly noted for its extensive and celebrated analysis of Beethoven's Eroica Symphony, with all four movements meticulously examined and graphed.

This volume is highly regarded for its detailed and celebrated analysis of Beethoven's Eroica Symphony, a cornerstone of Schenkerian analysis. The work is recognized for its rigorous examination of musical structures and its contribution to music theory. The collection as a whole provides insight into Schenker's broader philosophical views on music, art, and culture, making it a significant resource for scholars and musicians. Its depth and analytical precision have cemented its place as a key text in musicological studies.