and we're almost there
So it appears I need to use the full address of the content server for --with-library (not exactly sure why as the process is occurring locally)
*/10 * * * * calibredb add /home/craftyclown/Calibre/New/Sonya -r --with-library
http://richflix1.ddns.net:8882/#Sonya
Not quite sure how to delete the books from the download folder after they've been ingested into the library though.
I still feel like I'm missing a trick here. Suggestions?