I have played, among ther hings, scales, Hanon and this collection " 30 New Studies in Technics " by Carl Czerny.
The 30 new studies consists of six little books each of which includes five exercises.
They cover a broad range of the technical skills a pianist will need to play difficult music.
They should n't be rushed, at least for adult amateurs, and patience always is important.This edition sits easily on the iano and the large notes are easy enough to read, even when there are plethor of them.
I think this ook will be necessar for serious adult amateurs at the iano.