Hmmm..., this name — Michael S. Heiser, PhD — I recognize. I’ve communicated with him on Chuck Missler’s member boards. He’s well-regarded there and has a lot of materials about those angels...
It’s interesting and I do think that Genesis 6 is about the fallen angels cohabiting with women on earth. It appears to be “solid” in regards to the text itself and its meaning, and what it has meant to Jewish scholars in the past centuries, not to say anything about a significant number of Christian scholars, too...
[ ... a ping to y’all, too... ]
Ooops, I see you’re here already, Quix... You always beat me to the good stuff... :-)
I read his book "Facade"...it was OK but not great. He is probably much better at scholarly writing than fiction.