Re: Narrative Nonfiction vs Historical Fiction
The line is a blury one, but I would say that the difference between Narrative Nonfiction and Historical Fiction is that in the Historical Fiction the "fictional" detailings of things like thoughts and speech will be a constant, whereas in Narrative Nonfiction they will appear in brief bursts seperated by the major sections of pure 100% fact.
One could compare it to including in a book numerous paintings of the main figures that were made long after they were dead. As such, the painting would be based upon the impressions of the artist - "fictional", in a sense.
There is also that the Narrative Nonfiction will be utterly based on the historical record when it doesn't slip into detailings, whereas even Historical Fiction that is masterly in its accuracy of events, such as Colleen McCullough's books, will occaisonally slip into altering the events slightly, usually for the sake of brevity.