Fréderic Chopin's stay with George Sand on Mallorca in the winter 1838/39 was ill-fated. Yet Chopin still managed to finish his Préludes there which he had begun to compose in Paris. Today's interpreters not only have to deal with numerous variants but also with corrupt performance traditions. The Préludes are the first edition to be completed in our comprehensive Chopin revisions. The editor has taken the latest scholarly findings into account and in the musical text brings to light “established” variants as well as others that are to be found in the sources.