[JSWolf]

Originally Posted by Sunlite

With the searche

series_index:"1"

I can find all books that have either no series index set or are the first in a series.

You could use that to create a virtual library. If you use the cover grid, you could add an icon to the covers of books with a series.

In the book list you could mark line with books in a series with a rule.

Or you could change the text color for books without a series.