Hancock's Familiarity with Native American Laws and Literature (no replies)

I was curious about Graham Hancock's familiarity with NAGPRA (if he had read it) or the work of something like Sarah Baires' that talks about Cahokia being a reflection of the living world and possibly a city of the dead. It uses stories from the Osage in its interpretations.

I was informed that Hancock is "pretty available" and responds to questions like this on here.