Thanks for your help but I have a problem.
I see your page but, I don’t know why, on my site, which was created before I put in your theme, I already had an authors page where I put in my authors. (here link: https://www.hopeedizioni.it/wp-admin/edit-tags.php?taxonomy=book_author&post_type=product)
These authors do not show up on the page you created, is it possible to create the authors page like this one here but with my authors already resistered on the page I linked to you?
Thanks so much for your help
Cristina