25 etudes for piano solo, using each of the intervals from the minor second to the tritone, and their inversions, singly and in all combinations. Symmetrical and mirror-fingered passages throughout. Black and white key symmetry throughout as well. A range of dynamics, tempos, and moods. Can be performed in any order, or the preferred score order of ascending intervallic complexity. Any single piece suitable for a recital. Medium advanced to college-level. Coil-bound. Audio is Etude 1.0+3.0