What has the author George Robert Rapp written?

There doesn't appear to be a widely known author named George Robert Rapp.

It's possible that:

* The name is misspelled: Perhaps you meant a different author. Double-check the spelling.

* The author is less known: He might have written lesser-known works or be active in a niche field.

* The author is fictional: It's possible you're thinking of a character from a book, movie, or game.

Could you provide more context or details about George Robert Rapp or the type of writing you're looking for?