Do I have any control on the order in which search results are presented?

If you do an Author search for Cornwell, patr
the results of Patricia Cornwell’s works come back to you alphabetically by Title.

If you then wish to reorder the results, select the Limit/Sort Search button and you will have the option to: Sort results by year

If you do a Keyword search for
Patricia Cornwell
The results come back to you in an order determined by relevance.

You then have the option to change the order from sorted by relevance to sorted by date, giving the results in reverse chronological order; that is, newest publication date first.