Add a book to an existing series

[Ivy]

Hello!

I'm trying to add my 6th book of a series into my series "The Hunted Series".

Here is a link to the 6th book:
https://www.goodreads.com/book/show/2...

Here is a link to the series I'm trying to add it to:
https://www.goodreads.com/series/1615...

I followed the directions here: https://www.goodreads.com/help/show/3...

But I couldn't find the "edit" button. Is there any way you could add it for me?

Thank you so so much!

[free]

added...
author can't edit series...