I’m using custom post types for a site that lists books. Each book has certain data, including a genre (which is a custom taxonomy), and an author, which is actually another custom post type.
I can hack it to work by just putting the author name or internal id into a custom field, but it won’t really be normalized.
I’d rather be able to choose which author(s) wrote a book from a list as though they are part of a taxonomy like a category.
Is it possible to relate posts to each other like that using custom post types/taxonomies?