Step inside the life of Johann Sebastian Bach (1685-1750) with an interactive biography that pairs a six-era narrative life, a real geographic map of the German Baroque world, a dual-track timeline, a force-directed network graph of his teachers, patrons, sons, and successors, four primary sources, and a 14-question quiz with audio-recognition items. What makes this different: five public-domain recordings of Air on the G String, the Brandenburg Concerto No. 3, Toccata and Fugue in D minor, the