Quiet: The Power of Introverts in a World That Can't Stop Talking, Susan Cain. (Crown, 1/24/2012)
I don't often get excited about business books, but I'm so glad a Random House sales rep pushed this one into my pile at NEIBA. Fellow introverts, you will join me in realizing why you do stuff (not just the obvious "prefer to be alone" things, but more subtle aspects of behavior) every time Cain throws out a new piece of research. Some of the evolutionary psych aspects of introversion are pretty fascinating, too.
(Review copy provided by publisher, obviously.)