Adding my name as narrator to existing record

[William]

I'm an author as well as narrator and recently received permission to make a special set of short audiobooks from the works of Clark Ashton Smith. I've entered all the usual information, but in one or two cases, the books "already existed".
With existing entries, I cannot seem to add my name as narrator no matter what I do. Is there a way to work around this? Or would a librarian need to assist? Thanks!

[rivka, Former Moderator]

An example of one of them would probably help. Where are these books (going to be) available?

[William]

Thanks Rivka! The easiest way for me to show you is by ISBN.
The one affected volume is:
9781662275081 (The Death of Malygris)

OTOH other volumes I was able to add the Narrator information as I built them in from scratch, e.g.:
9781664977235 (The Double Shadow)

[free]

done...

[William]

So grateful!

[rivka, Former Moderator]

If there are any others, just link to them here and we can add you to those as well.