Fréderic Chopin's stay with George Sand on Mallorca in the winter 1838/1839 was ill-fated. Yet Chopin still managed to finish his Préludes there which he had begun to complus in Paris. Today's interpreter not only has to deal with numerous variant readings 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 which are to be found in the sources. And there is another first here, too: the printed volume contains a shorter critical report - the extensive version with all the details can be downloaded on the internet.