This critical edition investigates the complex editorial history and structural evolution of Modest Mussorgsky's opera Boris Godunov by providing a definitive, multi-lingual full score. The editor, David Lloyd-Jones, utilizes original autograph manuscripts to reconcile discrepancies between the composer's various versions of the work. By presenting the score alongside critical commentary and historical appendices, the text establishes a rigorous framework for understanding the opera's development from its initial conception to its final performance state.

Musicologists and conductors frequently cite this edition as a standard reference for the study and performance of Mussorgsky's work. Experts highlight the meticulous nature of the editorial process and the value of the included appendices for comparative analysis.