From the authors of the #1 NEW YORK TIMES bestselling HALF THE SKY, a unique and essential narrative about making a difference in the world--a road-map to becoming a conscientious global citizen. Soon to be the basis of a PBS four-hour series. With scrupulous research and on-the-ground reporting, the authors assay the art and science of giving--determining the current most successful local and global aid initiatives (on issues from education to inner-city violence to disease prevention), evaluating the efficiency and impact of specific approaches and charities, as well as fundraising.