Czerny, Carl

Very satisfying.
I've been looking for the Grand Sonate d'Etude for years and I would have paid the $25.50 for that alone. What I got instead is a treasure trove of music that I probably never would have even heard of.
In this collection you get not only all the main books of studies but also some lesser known studies (the etudes for the left hand alone are particulary interesting), some great transcriptions and original music which defies Czerny's reputation as a bland composer of technical exercises.