A meditative work that utilizes long, singing lines to evoke a peaceful autumnal scene. The writing is deeply rooted in the nocturne tradition but features modern, subtle harmonic inflections.
Achieving a seamless, singing cantabile melody over the accompaniment is the primary pedagogical goal.
Comparable difficulty and character — good candidates for what to learn next.
Autumn is Peaceful (Op.91a) 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 Autumn is Peaceful (Op.91a) lasts about 3 minutes.
Autumn is Peaceful (Op.91a) is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.
Pieces at a comparable difficulty and character include Autumn is peaceful by Alexander Mekaev, Before the eclipse op. 71 by Alexander Mekaev, "Kennst du das Land?" op. 105 by Alexander Mekaev — see the full similar-pieces list on this page.