As a frankly commercial, but still musically relevant answer, I suggest you learn MINE. 25 Etudes, using symmetry, mirroring, and intervallic control to create music of many different moods and colors. Some slow, some fast, some wide lines and fragmented segments, some smooth melodies and quiet moods. Not your usual Chopin, Debussy, or even Czerny.
All the pieces have numbers as titles, they're labels, really. They refer to the interval(s) used for each piece, from the 1/2 step to the tritone and all the possible combinations. 0.5 = the half-step piece, 1.0 the whole-step one, etc.
They are available as a set, spiral bound, large-format, from J.W. Pepper. Here is a link to the page in question.
https://www.jwpepper.com/10341556.item#.UqJK-tJDtHk88melter