Invalid ISBN but book is existing [Resolved]

[Nan]

The ISBN for this audio book is invalid, I really can't find anything that matches with it.
https://www.goodreads.com/book/show/1...

However, as you can see the audiobook does exist, http://blackgold.lib.overdrive.com/AD...

How do I resolve this?

[Empress]

ISBN13 should have 13 numbers, you can see that a number has been missed, just add it in both the ISBN 13 and the ISBN. But since the other ISBN is in the database you might need to convert this edition into ACE

978160788573 = 9781607885573

But wait for a second opinion.

[Nan]

Thanks Ellie :)

I am an idiot, I couldn't find the ISBN because I didn't search the page properly! The ISBN is valid, but another edition already has it. I just added an ACE because despite the sam eISBN, the covers differ.