This volume contains the three Impromptus published during Chopin's lifetime, and the Fantaisie-Impromptu (so described by the editor Julian Fontana) issued posthumously.
Chopin: Fantaisie-Impromptu c sharp minor op. post. 66 Chopin: Impromptu F sharp major op. 36 Chopin: Impromptu G flat major op. 51 Chopin: Impromptu A flat major op. 29