expo america 2011, this persius book, and one of them is public affairs, and the publisher is susan winebergo is going to tell us about the new books coming out by public affairs and the future books. where should we start? >> it's always so great to see you at book expo, and we can start with a become -- a book that is coming out called the building open societies. this is a book about george's work. he has given away billion and billions of dollars through this open society foundation, based on his principles and putting his philosophy to work in the real world. it covers his programs from around the world and includes an essay from george called, my philanthropy. >> now right next to that is poor economics. >> it's one of the most exciting big idea books we have had in a while. the authors are the founders of the m.i.t. poverty lab, and they have really pioneered the idea of, let's do some on the ground work, experiments, observations, to learn what really works in development. where we should put our effort. where we should put our money. and they are award-winning, acclaimed economists