William Kinderman is Professor of Musicology at the University of Illinois - Champaign-Urbana. His books include Beethoven's "Diabelli" Variations (OUP, 1987), ed., Beethoven's Compositional Process (Nebraska, 1991), Beethoven (OUP and California, 1995), ed., The Second Practice of Nineteenth-Century Tonality (Nebraska, 1996), Artaria 195: Beethoven's Sketchbook for the 'Missa solemnis' and the Piano Sonata in E Major, Opus 109 (Illinois, 3 vols., 2003), ed. (with Katherine Syer), A Companion to Wagner's "Parsifal" (Camden House, 2005), ed., The String Quartets of Beethoven (Illinois, 2006), and Mozart's Piano Music (OUP, 2006). He is also an accomplished pianist whose recordings have been met with global acclaim; his double CD of Beethoven's Diabelli Variations has appeared with Arietta Records.