"The extent and range of Warhol's success, and his deliberate attempts to thwart his biographers, means that it hasn't been easy to put together an accurate or complete image of him. But in this biography, unprecedented in its scope and detail as well as in its access to Warhol's archives, Gopnik brings to life a figure who continues to fascinate because of his contradictions--he was known as sweet and caring to his loved ones but also a coldhearted...