John S. Shedlock covers the history of what might now be called the keyboard sonata, from Kuhnau's Sonata in B flat from 1695, believed at the time to be the earliest keyboard sonata, up the present day. Along the way, works by Emanuel Bach, Haydn, Mozart, Beethoven, Weber, Schubert, Schumann, Chopin, Brahms, Liszt and others are looked at, along with many musical extracts. - Summary by Jordan