Hey @soulchilogylife!
NPD is an excellent subject matter to explore! My Father is a retired Consultant Psychiatrist, and I had a lot of discussions with him on topics such as this (including BPD which was fascinating) through my teens and still do when I get the time. He is an exceptional Clinician and Psychiatrist!
I look forward to seeing more stuff from yourself. I will also check out the book you authored. It sounds interesting.
Many Thanks,
@shenobie