Bach's pedagogical pieces, which even his sons practised, especially Wilhelm Friedemann and Carl Philipp Emanuel, are still used throughout the course of learning the piano today. These eighteen preludes have been grouped and published in one volume ever since the Ferruccio Busoni edition at the beginning of the 20th century, although current scholarship questions the authorship of some of the works.

Through his work as teacher and editor, Lajos Hernádi has supplied the eighteen preludes with performance indications. This edition, already familiar to the Hungarian public, is now available to students of music in a new form.