Bach's Inventions and Sinfonies are rightly considered indispensable to any pianist. In his famous foreword, the composer describes himself as a "guide" who will teach students and amateurs to play two and three voices "correctly", "to get a cantabile game", and at the same time their will give "a taste of the composition". With this pedagogical goal in mind, Bach has given birth to a superb and timeless music that has lost none of its relevance nearly 300 years after being written. We present a new edition of this repertory classic, based on all sources known to date and which offers the best "guide", especially on ornamentation variants. The new Bach - a "must" for pianists of all ages.