Hans von Bülow described Beethoven's 32 piano sonatas as “Music's New Testament.” Since its first appearance, Henle's complete two-volume edition  has been valued by specialists as the most dependable Urtext, and belongs in every pianist's library. It contains an inexhaustible treasure of pianistic and musical mastery, setting technically challenging works with a high level of name-recognition, such as the “Pathétique,” “Moonlight,” “Tempest,” “Waldstein,” “Appassionata,” and “Hammerklavier” sonatas, alongside other, less difficult works.