My library copy of Quiet: The Power of Introverts in a World That Can't Stop Talking looks to still be several weeks away, but if you have 19 minutes you can hear a TED talk by Susan Cain, the author. (H/T DSTB) I like that she acknowledges the value of both introverts and extroverts, and stresses the need to use the best talents of the entire spectrum in addressing the problems of today.
Quotes are too hard to pull from a talk, but here's a short one from the introduction, where she describes her first summer camp experience:
In my family, reading was the primary group activity. ... [F]or us it was just a different way of being social. You had the animal warmth of your family sitting right next to you, but you were also free to go roaming around the adventure land inside your own mind. And I had this idea, that camp was gonna be just like this, but better. I had a vision of ten girls sitting in a cabin, cosily reading books in their matching nightgowns....