Help Combining Editions

[Claire]

There were several duplicate editions of The Absent One by Jussi Adler-Olsen. I was able to combine most. However, there is one that is separate, and I can't figure out how to combine it. Not sure if this will work, but here is a link to it: https://www.goodreads.com/book/show/1...

Here is a link to the main/correct edition: https://www.goodreads.com/book/show/1...

Can someone either fix it or tell me what I'm doing wrong?

[❂ Murder by Death]

Fixed it. The one that wouldn't combine had the author's name wrong - instead of Olsen with an "O" it was 0lsen with a "0" (zero).