'The most monumental of Beethoven's piano sonatas.' Editor Jochen Reutter describes the lengths to which his research has gone in trying to produce a critical and definitive edition of this great Beethoven work. No manuscript or autograph is known to exist, so an amazing bit of detective work included a wealth of correspondence with editors, publishers, engravers, etc. The resulting edition is handsomely printed in a critical edition which is perfect for practical performance.