Felipe Brandes' "9 Klavierstücke" Op. 22 are a collection of piano pieces likely written in a modern idiom, possibly with an emphasis on technical challenges and expressive content. They would showcase a composer's individual voice and approach to piano writing.
Focus on precise articulation and rhythmic accuracy to meet the technical demands of these etude-like pieces.
9 Klavierstücke (Op.22) is rated Henle level 4 of 9 — intermediate repertoire, roughly ABRSM grades 5–6. In the RCM system it corresponds to about level 6.
You should be comfortable at Henle level 4 — meaning you can already play level 3–4 pieces cleanly. Learning it one level early is possible as a stretch piece, but more than that usually leads to months of frustration.
9 Klavierstücke (Op.22) is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.