How do you add a book to a series?

[Amber]

I'm trying to add this book:

https://www.goodreads.com/book/show/2...

To this series:

https://www.goodreads.com/series/3003...

I see how to create a new series, but I don't see how to add it to the existing series.

[Camilla]

On the series page, in the upper right corner, there's an Edit button. Click on it, it takes you to the series edit page. There's the option to add books to the series.