Johann Baptist Cramer's '3 Piano Sonatas' Op. 22 are significant works from the late Classical period, demonstrating refined technique and lyrical expression. His sonatas are known for their balance of virtuosic elements with graceful melodic lines.
Develop a singing tone in the melody and ensure clean, agile passage work.
3 Piano Sonatas (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.
A typical performance of 3 Piano Sonatas (Op.22) lasts about 25 minutes.
3 Piano Sonatas (Op.22) is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.