This Urtext edition of Beethoven's piano sonatas is based on the autograph or manuscript and/or first edition(s) of the works. This first volume of three contains opuses 2, 7, 10, 13, 14, and 22. The editorial additions have been kept to a minimum and are indicated by square brackets. In regard to the manner of performance, the execution of ornaments, and fingering, no suggestions have been made. Beethoven's original fingering is included unchanged. The inconsistencies of the sources are explained in the Notes.