How to add anthology to my works?

[Wendy]

I'm one of several short story authors in a book already on Goodreads:
Fantasy for the Throne: One-Sitting Reads (from Fantastic Books). I've been trying--for hours--to add this to my list of works, like two other anthologies my writing is in. I keep getting "add a new book" as if it were not listed. It's not new to Goodreads. It came out in December 2018 and already has a listing. Can you help me add it to my list of works? Thank you.

[Olivia]

Hi Wendy,
You will need a librarian for this, as it takes one to edit book data.
Please list the links to the books your name should be added to in the new thread in the 'Book issues' folder.

[Scott]

I added you to Fantasy for the Throne.