His scherzos are truly novel metamorphoses of the form — tumultuous emotional outpourings that frequently attain tragic heights. Prepared by Carl Mikuli, Chopin's student and teaching assistant, this edition of these innovative works is particularly authoritative, reflecting Mikuli's knowledge and understanding of Chopin's music. This volume includes: Waltzes Op. 18 Op. 70, Nos. 1–3 Op. 34, Nos. 1–3 E Minor, (Op. posth.) Op. 42 E Major (Op. posth.) Op. 64, Nos. 1–3 Op. 69, Nos. 1–2 Scherzos Opp. 20, 31, 39, 54.