What has the author Joan Rippengal written?

There doesn't appear to be a widely known author named Joan Rippengal. It's possible that:

* The name is misspelled: Could you double-check the spelling?

* The author is less well-known: They might be a niche writer or have a different pen name.

* The author is new: They might be a new author, and their work hasn't been widely published yet.

To help me find the author, could you provide more information?

* What genre does their work fall into? (e.g., fiction, non-fiction, poetry)

* Do you know any titles of their books?

* Do you know any other details about the author? (e.g., country of origin, writing style)

With more information, I can help you find the author you're looking for!