I had the pleasure of walking into my local bookstore a few weeks ago to meet a former death investigator doing a book signing for his recently released novel, about the cases he had encountered while working in Atlanta.While it was not the typical sort of thing I would flock to for reading, as I tend to be squeamish about blood and guts narratives, I found myself wanting to learn more about the kind of man who could endure the skin-crawling profession. Joseph Scott Morgan, author of “Blood Beneath My Feet,” is amiable, down to earth, and easy to talk to — quite a contrast from the tone and topics of his often disturbing but consistently engrossing book. “Blood Beneath My Feet” may be a gruesome account of various suicides, homicides and accidental deaths, but it is also an honest, moving and eloquent memoir of a man who routinely had to confront what most of us would never dare face.