How do you edit the number of pages in a book?

[TJ]

I'm currently reading Firefly Lane by Kristen Hannah. Goodreads says it is 479 pages but my copy is 556.

[Javier]

Non-librarian users cannot edit entries, please post a request in the Page Numbering Requests folder.
See here for further instructions: https://www.goodreads.com/topic/show/...