It would appear that J.S. Bach really composed his two- and three-part Inventions (Sinfonias) on purpose to prepare his pupils for his larger works, - especially for his "Well-Tempered Clavier", - and as such they cannot be too urgently recommended. And to this day, a diligent study of these Inventions will greatly benefit every talented student of the piano who desires to rise above mediocrity; they will cultivate his musical taste and develop his technic. For in no modern, easy piece of music is the left hand given so independent of a treatment of the theme as in these Inventions.Edited By:Carl Czerny (1791–1857)Friedrich Conrad Griepenkerl (1742–1849)Friedrich August Roitzsch (1805–1889)(Note: This edition contains only the 15 Inventions, and not the 15 Sinfonias.)