The Tucson Weekly has finally gotten around to reviewing Cold Black Hearts, and although their reviewer would prefer that it didn't have supernatural elements, they generally have nice things to say about it. Here's the takeaway:
"You will keep reading, though. This is Mariotte's great talent: His writing hooks you, and you just have to see how things end. And Annie, much in the vein of the maverick lady investigators and interrogators that populate cable television, is sassy, interesting and smart—and not afraid to risk her reputation, her relationships or even her life to get to the bottom of something."