Throughout his life Mozart composed individual pieces for the keyboard. This wealth of material offers us an exceptional insight into his musical development. For the first time ever, we are now offering all of these works in a single edition. Our edition has been completely revised, taking into account the latest findings in Mozart scholarship. In many instances, sources which have only recently been made available or which have been newly interpreted have formed the cornerstone of the revision. This has also led to the inclusion of works which were not in the previous Henle edition.?