Does anyone know how much it would cost to have your book featured in a major bookstore, such as barnes and noble or borders? I was wondering...if a self published book were to be carried at one of those stores (I know barnes does if it has an isbn and a few other requirements), could the author pay to have it featured more prominently? Or do the overlords of the stores decide this? And if you can pay for a more prominent display, about how much? Thanks.