One question that I hear a lot is about when the ghost writer took over. The lines are a bit blurry, I'm not sure if VCA started novels and didn't finish them, left outlines, or if the ghost writer is just writing in her style, but I do know that the Dollanganger series is the only one that she completed. Heaven might have been written by her as well, but I believe that's it.

I think My Sweet Audrina was written by her as well.

Yep, from what I remember reading it was My Sweet Audrina, the Doll series, and possibly Heaven.