In the Light of What We Know takes us on a journey of exhilarating scope--from Kabul to London, New York, Islamabad, Oxford, and Princeton--and explores the great questions of love, belonging, science, and war. It is an age-old story: the friendship of two men and the betrayal of one by the other. The visitor, a man desperate to climb clear of his wrong beginnings, seeks atonement; and the narrator sets out to tell his friend's story but finds himself at the limits of what he can know about the world--and, ultimately, himself. Set against the breaking of nations and beneath the clouds of economic crisis, this surprisingly tender novel chronicles the lives of people carrying unshakable legacies of class and culture as they struggle to tame their futures. In an extraordinary feat of imagination, Zia Haider Rahman has telescoped the great upheavals of our young century into a novel of rare intimacy and power.