Penelope Thwaites is a popular Australian pianist who is best known for her advocacy of the piano music of Percy Grainger. Indeed, she has recorded about 250 pieces of Grainger's music, spread over 10 discs in a massive complete Grainger project on the Chandos label. Yet, for all her selfless championing of Grainger's music, she herself is a talented composer in her own right and a virtuoso pianist possessing a fairly broad repertory. Her own compositional output includes chamber, choral, vocal, piano, organ, and theater works. Beyond her extensive Grainger repertory, Thwaites...