The first book of etudes was completed in 1983 and consists of 18 pieces. These etudes are known for their exploration of various technical and musical ideas, often pushing the boundaries of traditional piano technique.
If you need study resources (analysis, recordings, practice tips): ligeti etude pdf
In Désordre (No. 1), Ligeti applies principles of chaos theory, using simple processes that become increasingly distorted through iteration. The first book of etudes was completed in
: The Études are published by Schott Music . They are divided into three books: Book 1 (1985) : Études 1–6 Book 2 (1988–1994) : Études 7–14 Book 3 (1995–2001) : Études 15–18 practice tips): In Désordre (No. 1)