There are a number of works in the well-known piano repertoire which, due to the colossal degree of piano difficulties, have become a permanent feature of the canon of the most demanding compositions. There is also a group of works which, to a greater extent, require from the pianist, above all, a great musical imagination, maximum concentration on every textural and formal detail as well as the ability to construct an extensive, multi-threaded narrative. Undoubtedly, this group includes the extensive Sonata in B-flat Major D. 960 by Franz Schubert, recorded by a Polish pianist - Katarzyna Kling. The work, which is the core of the repertoire of this album, prompts both the performer and the listener to many philosophical and musical reflections. The pianist, appreciated both in the field of performance and teaching, completes the solo album with the Impromptu in E-flat Major, Op. 90 No. 2, D. 899, which in combination with the last Sonata allows the listener to get to know Schubert from two separate perspectives.