I just saw a tweet about this article: 10 Myths About Introverts. It's highly relevant to my previous post and it references a book that I want to check out called The Introvert Advantage: How to Thrive in an Extrovert World by Marti Laney, Psy. D.
The title of the book makes the allusion to my point in the previous post of how societal norms is an extroverted world. I'm glad I looked this book up on Amazon though as one of the comments has given potential future avenues of research into discovering different types of introverts.