I made this script because, when I've added multiple contributors to an anthology, I've grown tired of clicking the "add another author" link, moving my mouse slightly down, clicking it again, moving mouse slightly down again, etc., etc. This script adds a link (on the "Edit your book" page) that replicates the click of "add another author" 10 times.
Any unused fields are discarded when the page is saved (i.e., no blank authors get added).
As always, if you have any questions or find any problems, please let me know. I'm omargosh on LT.