This volume serves as the definitive, comprehensive catalogue of the complete musical compositions and literary writings of the Czech composer Leoš Janáček. The authors, Alena Němcová, John Tyrrell, and Nigel Simeone, utilize extensive archival research and primary source analysis to organize the composer's output. By providing a structured inventory, the book establishes a standardized reference framework for scholars and performers interested in the chronological and thematic development of Janáček's career.

Experts recognize this work as the foundational reference text for Janáček studies due to its exhaustive archival detail. Scholars frequently highlight the precision of the entries and the utility of the annotated writings for understanding the composer's creative process.