Author problem

[Vivien]

Hello,
I'm not sure how to solve this problem the correct way.
Authors are Stéphane Betbeder (Scenario), Federico Pietrobon (Illustrator), Jean-Luc Istin [on the English Goodreads entry here and on the cover too]

When looking at the German publisher page and at German Amazon, the authors are Jean-Luc Istin, Philippe Vandaële

I think they are named because they definitely wrote the first three parts of the series. But it seems Betbeder and Pietrobon are responsible for part four.

If that's right, would you change the authors and combine the editions of part 4?

[rivka, Former Moderator]

Sounds like Jean-Luc Istin should be the first listed author on all editions.

[Olivia]

done, also corrected the titles

[Vivien]

Thank you!

[lethe]

The German cover lists Betbeder and Pietrobon. Shouldn't they be mentioned as well?