An important part of this edition is the extensive preface. Firstly it informs about the sonatas` origins, their compositional process, pre-publication performances, their publication history as well as early reception. Truly remarkable is the unique Performance Practice Commentary. Here the editors start from the premise that already a few decades after Brahms' death, a widening gulf developed between the composer's expectations and the performance practices of the early 20th century. On the basis of manifold sources which include memoirs by pupils and chamber music partners, treatises and essays, early instructive editions and historical recordings, the editors deal with key issues in understanding Brahms' notation. By a section-by-section analysis of rhythm and timing, dynamics and accentuation, dots and strokes, slurring and non legato, piano pedalling and overholding, piano arpeggiation and dislocation, string instrument fingering, string instrument harmonics and vibrato, the editors provide an indispensable assistance for a historically informed interpretation of the works. At the same time, the edition offers an exciting and often surprising insight into musical interpretation of the German Romantic Era in general. -the publisher