[answered] What's the best way to get characters added to books?

[Carrie]

What is the best way to get characters added to book listings?
It appears it cannot be done by the author once a book is already listed on GR. (At least it's not working for me in the edit book section.)
I have about a dozen books over two series that I would like to add characters to. Should I do it in one post for the librarians, breaking it down by book, or separate posts for each book or series? And in which folder do I do it on?
Thanks!

[Arenda]

Separate posts please. Multiple posts for the same series in one thread is fine. In folder Book Issues.

[Carrie]

Thank you.