* The name is misspelled. Perhaps you're thinking of a different author with a similar name, such as Albert Schweitzer (famous philosopher, theologian, and physician).
* The author is relatively unknown. It's possible that Robert Schweitzer is a lesser-known author who has published works in a specific niche or genre.
* The author is fictional. It's possible the name is a character from a book, movie, or other work of fiction.
To help me find the right author, could you please provide more context?
For example:
* What kind of books do you think Robert Schweitzer might have written? (Genre, topic, etc.)
* Do you have any other details about the author, like their nationality or time period?
* Have you seen any of their books or articles?
With more information, I can try to find the author you're looking for.