Eduardo Saverin and Mark Zuckerberg were Harvard undergraduates and best friends?outsiders at a school filled with polished prep-school grads and long-time legacies. They shared both academic brilliance in math and a geeky awkwardness with women. What followed?a real-life adventure filled with slick venture capitalists, stunning women, and six-foot-five-inch identical-twin Olympic rowers?makes for one of the most entertaining and compelling books of the year. Before long, Eduardo?s and Mark?s different ideas about Facebook created in their relationship faint cracks, which soon spiraled into out-and-out warfare. The collegiate exuberance that marked their collaboration fell prey to the adult world of lawyers and money. The great irony is that while Facebook succeeded by bringing people together, its very success tore two best friends apart.