how to have two titles for a post

Im working on a book publishing company website.

I use the post titles as the “book names” but I don’t know how to enter the author names for each post

Is there any suggestion and any use of examples to achieve this?

Because author name must also be clickable to display his all other books.

I dont want to use the tags or categories for the author names. But wan to have a different field for that.

Any help or suggestion I would really appreciate.

Best.