What has the author W J M Wippersberg written?

There doesn't seem to be a widely known author named W. J. M. Wippersberg. It's possible that:

* The name is misspelled: Perhaps you're thinking of a different author with a similar name.

* The author is less known: They may have written niche works or self-published.

* The author is fictional: It's possible the name is part of a story or fictional universe.

Could you please provide more context or information about this author? Knowing the genre, time period, or any other details could help in finding out what they have written.