"No, my publisher has always done the marketing"

Jean M. Auel's quote suggests that her publisher has actually always been accountable for the advertising and marketing of her publications. This suggests that Auel has not been involved in the marketing of her very own job, leaving it as much as her author to advertise her publications. This can be as a result of an absence of expertise or experience in marketing, or merely because she favors to focus on the writing aspect of her job. It might also signify trust in her author, as she is certain that they will certainly do an excellent job of marketing her publications. Whatever the reason, it is clear that Auel has actually picked to leave the advertising of her work to her author.