Klavierbüchlein für Wilhelm Friedemann Bach

Klavierbüchlein für Wilhelm Friedemann Bach (Bach's original spelling: Clavier-Büchlein vor Wilhelm Friedemann Bach) is a collection of keyboard music compiled by the German Baroque composer Johann Sebastian Bach for his eldest son Wilhelm Friedemann. It is frequently referred to simply as Klavierbüchlein.

Johann Sebastian began compiling the collection in 1720. Most of the pieces included are better known as parts of The Well-Tempered Clavier and the Inventions and Sinfonias. The authorship of most other works is debated: particularly the famous Little Preludes BWV 924–932 are sometimes attributed to Wilhelm Friedemann Bach.