Cover page of the Orgelbüchlein, from IMSLP The Orgelbüchlein Project is a major international composition project to complete J S Bach’s Orgelbüchlein (Little Organ Book). It is curated by William Whitehead. Intending the Orgelbüchlein to be compendium of chorales for the whole church year, Bach began composing in around 1713 (possibly earlier), and wrote out the title of each of the 164 Chorales he wished to include. Only 46 were completed by him (with a sketch for one other) so there are 118 ‘ghost’ chorales awaiting completion. It is not known why he left the manuscript…