Susan Cain- she wrote Quiet: The Power of Introverts in a World That Can't Stop Talking and she herself is an innie. She gave a great Ted Talk.

One part of the book that really resonated with me was in the early 1900's personality started to become more valued than character. I hate this, it's so wrong! This feels like the root of all evil for me. Because I'm not in your face friendly shouldn't matter because I am considerate. Because I'm not bubbly shouldn't matter be cause I'm honest and empathetic. It feels like the US is really bad about this. The best bullsh*tter gets the farthest.

But anyway I love Susan Cain there is lots of good stuff in her book, I highly recommend it.