Goodreads Librarians Group discussion

I started including the books of my eight year old son into my library yesterday and we came across a strange habit.

It seems that there is no accordance between the numberings of different language editions of the Geronimo Stilton's Children's books - so it happened that our (german) edition is numbered "3" and happens to be book number 8 of the English edition.

I included our book as #8, anyway, but so there would be a problem for ppl with the german edition to find "Book Number 3".

What do I do? I've seen books that happen to be part of more than one series (p.e. crossovers) listed as both.
So I thought, I start a "German edition" series seperately and make the book part of two series.
But I don't know a. if that's right in view of the goodreads-procedures and b. how i put a book as part of TWO series.

Would be nice, if anyone could help me. Thanks!

Currently there are already an English and an Italian order series for Geronimo Stilton, so if the German order is different from those two, another series can be created.
Adding a book to a second series works the same way as for the first series. But all editions of a work will have the same primary series, so you can't select for only the German editions that the German series is in the title. A second series will only be at the book details.