Druella Rosier's Guide to Surviving Among Humans, Dealing with Boors, and Rescuing Castles from the Ignorant Incompetence of their Residents. (And possibly conquering Europe, just a little.) Dru Rosier is a brilliantly talented, highly accomplished magical prodigy. Unfortunately, she is also eleven, and her mother thinks she needs to learn how to relate to other children. Bother.