These graded collections of piano duets by master composers are among the best literature available at respective levels. Each duet, written by composers who lived in the 18th, 19th and 20th century, has been carefully edited and fingered for performance ease. Masterwork Classics Duets, Level 1 (A Graded Collection of Teacher-Student Piano Duets by Master Composers). Edited by Gayle Kowalchyk, E. L. Lancaster, and Jane Magrath. For Piano. Book; Duet or Duo; Graded Standard Repertoire; Masterworks; Piano Duet (1 Piano, 4 Hands). Alfred Masterwork Edition: Masterwork Classics Duets. Masterwork. Elementary. 40 pages.