You must own the transcendental studies:
«Kaikhosru Shapurji Sorabji’s 100 Transcendental Studies (1940–1944) form the largest collection of concert études in the piano repertoire. Spanning over eight hours, the studies demand incredible virtuosity, featuring atonal melodies, complex polyrhythms, and thick textures. The definitive recording is by pianist Fredrik Ullén»
If someone do not know Sorabji i recomment the "perfumed garden" . It is almost impossible to not fall in love with this piece .
What Sorabji piece is a possible top three favorite? Is it the "Fuga a Quattro Soggetti" from his "Clavicembalisticum/" I don't have that much of his insanely long and complicated works, but, I would be interested to know what others like a lot.

