I often like to check the table of contents, so I would support the option to upload it separately as an image or enter it manually.

When exploring books in a bookstore, I usually open a book to read the chapter titles. I would appreciate an implementation where this is available as an additional metadata field.

Manga readers typically search by chapter rather than volume. For example, they might look up which volume contains chapter 1100.

https://hardcover.app/books/one-piece-vol-1