If anyone is interested in joining the Introverts social group: http://forums.psychcentral.com/groups/introverts.html

Susan Cain has published a book called "The Power of Introverts." She has given a Ted Talk here about the subject of Introversion versus Extroversion here: .

There's also a one hour long Q&A session recording that she gave at Google if you still want to hear more of what she has to say on the topic after watching the Ted Talk. You can find it on YouTube.