What to read after The Keyboard Music of J.S. Bach?

The Keyboard Music of J.S. Bach provides an introduction to and comprehensive discussion of all the music for harpsichord and other stringed keyboard instruments by Johann Sebastian Bach (1685-1750). Often played today on the modern piano, these works are central not only to the Western concert repertory but to musical pedagogy and study throughout the world.
Intended as both a practical guide and an interpretive study, the book consists of three introductory chapters on general matters of historical context, style, and performance practice, followed by fifteen chapters on the individual works, treated in roughly chronological order. The works discussed include all of Bach's individual keyboard compositions as well as those comprising his famous collections, such as the Well-Tempered Clavier, the English and French Suites, and the Art of Fugue.