The Complete Études, op 10, op. 25, op. post.

147 p. 27 Études: 12 etudes Op. 10, 12 etudes Op. 25, 3 nouvelles études B.130. Wikipedia: "The Études by Frédéric Chopin are three sets of solo studies for the piano published during the 1830s. There are twenty-seven compositions overall, comprising two separate collections of twelve, numbered Opus 10 and 25, and a set of three without opus number."Contents:
Etudes, Op.10
No. 1 in C major
No. 2 in A minor
No. 3 in E major "Tristesse"
No. 4 in C♯ minor "Torrent"
No. 5 in G♭ "Black Key"
No. 6 in E♭ major
No. 7 in E major
No. 8 in F major
No. 9 in F minor
No. 10 in A♭ major
No. 11 in E♭ major
No. 12 in C minor "Revolutionary"
Etudes, Op.25
No. 1 in A♭ major "Aeolian Harp"
No. 2 in F minor
No. 3 in F major
No. 4 in A minor
No. 5 in E minor
No. 6 in G♯ minor
No. 7 in C♯ major
No. 8 in D♭ major
No. 9 in G♭ major "Butterfly"
No. 10 in B minor
No. 11 in F minor "Winter Wind"
No. 12 in C minor "Ocean"
3 Nouvelles études, B.130
No. 1 in F minor
No. 2 in A♭ major
No. 3 in D♭ major