@
mariaclaudia - it works fine for me
In my journals library, all authors have a unique value in the Manage Authors author_link field, they are urls to notes in an Evernote database. The value of the author_link remains as it was when I add new 'books' for an existing author
When I add new books to that library I use the 'get metadata from file name' option - i.e. the file name will be something like
Anne-Marie Slaughter - A Duty to Prevent.
Can you provide
- an example of an author and a couple of books (just the name and titles),
- the value you would have in the author's link field
- the value would have in the Preferences->Look and Feel->Book Details
- what method you use to get the Author name when you add books - from the file name, or from within the book - ie is the first option checked or not

The fact that I have a link to a note in an Evernote database is irrelevant. Before I thought of using links to Evernote Notes, they were links to folders, then they were links to a local web server.
In the Look and Feel field I have
search-calibre, but I just did a quick test with the default value (https://en.wikipedia.org/w/index.php?search={author}) and that made no difference.
BR