Part I : Considerations. Sources -- Beethoven and the piano -- Performance practices -- Beethoven's expressive legacy -- The windmills of Beethoven's mind -- Part II : The sonatas. The Opus 2 set -- Opus 7 -- The Opus 10 set -- Opus 13 ("Pathمaetique") -- The Opus 14 set -- Opus 22 -- Opus 26 -- The Opus 27 set : sonatas like a fantasy; no.2 ("Moonlight") -- Opus 28 ("Pastoral") -- The Opus 31 set no.2 ("Tempest"); no.3 ("Hunt") -- The Opus 49 set : two "easy" sonatas -- Opus 53 ("Waldstein") -- Opus 54 -- Opus 57 ("Appassionata") -- Opus 78 -- Opus 79 ("alla tedesca") -- Opus 81a ("Lebewohl") -- Opus 90 -- Opus 101 -- Opus 106 ("Hammerklavier") -- Opus 109 -- Opus 110 -- Opus 111