Interviewing for a Publicist/Marketeer

I’ve got a couple of projects in various states. My detective series hasn’t had much budgeted for advertising or publicity. Recently I had a couple of contacts in the content creation/marketing/publicity field. I’m planning on hiring one, at least on a trial basis, to see what paid professionals can do where the scattershot efforts of an author who has not moved the needle much at all have fallen short.