Multiple reviews

I have a website for an author with individual pages for each book (same template).
Some of these books will have a review that I would want to include on the page and some would have multiple reviews.
On the panel I will have a review field in each of the book pages.
Is it possible for the editor to add additional ‘review fields’ if this is necessary and how would I go about this?

I’d use a structure field or a blocks field with only one block type.

Great, structure fields look ideal. Thanks for your help.