These sonatas by Naderman are characteristic of the late Classical era, offering charming and graceful melodies. They are notable for their clear structures and approachable keyboard writing.
Focus on clear articulation and maintaining a singing tone in the melodic lines.
3 Sonates is rated Henle level 5 of 9 — late intermediate repertoire, roughly ABRSM grades 6–7.
You should be comfortable at Henle level 5 — meaning you can already play level 4–5 pieces cleanly. Learning it one level early is possible as a stretch piece, but more than that usually leads to months of frustration.
3 Sonates is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.