[capink]

Conditions does not check all selected books because they are meant quick branching tool based on things that can be tested quickly like selection_count etc.

If you want to check every book, and only process books that have series column (I suppose that what you want to do), you add a "Search using template" Action and do the following:

• Make sure the "Select all books resulting from this search" checkbox is ticked.
• Make sure you select the "template output is a list of book ids" radio button.
• Use the following template:
  

  program:
      book_ids = '';
      for book_id in from_selection('id'):
          if book_field(book_id, 'series') != '' then
              book_ids = list_union(book_ids, book_id, ',')
          fi
      rof;
      book_ids

This will deselect all books that are not part of a series.

As an aside, attach your screenshots to the post instead of using external sites as they are not showing.