The fourth volume of the complete recording of all 18 piano sonatas by W. A. Mozart - Mozart, the Traveling Whirlwind - includes the sonata movements in G minor, KV 15p, and Siciliano in D minor, KV 15u, from the London sketchbook of the 8-year-old Mozart; the sonata movement in B-flat major, KV 400/372; and Sonatas Nos. 7, 8, and 9. Michael Wessel combines the insights of historically informed performance practice with the rich, colorful tone of the modern Bösendorfer concert grand piano in a refreshing way: a lively, contrasting mixture of speaking and singing characters.