Music books I got songs from
Disclaimer:
I am not sponsoring any of those music books and have no affiliation with them
This piano book has most of the piano songs you would want to play, which includes Moonlight Sonata, Blue Danube, Air on a G String, Fantasie-Impromptu, and many more by your favorite composers.
Containing 59 famous piano solos, they include some of the best songs there is in the classical genre. That can include Peter and the Wolf, Liebestraum, and many others.
Contains a collection mainly targeted towards the adult students learning the piano. Also contains some well-known songs almost everyone knows.