The first biography of the most famous scientist of our time... Carl Sagan was one of the greatest scientists of this century -- the handsome and alluring visionary who inspired a generation to look to the heavens and beyond. His life was both an intellectual feast and an emotional rollercoaster. Whether he was seeking life on Mars or visiting Timothy Leary in prison, searching for radio messages from distant space or protesting nuclear weapons, prophesying some of the most exciting discoveries of modern science, filming the most successful PBS series of all time, or turning down invitations to dine at the Reagan White House, Sagan was always fascinating -- an enthralling, complex, contradictory prophet of the Space Age. Based on interviews with Sagan's family and friends, including his widow, Ann Druyan, his first wife, acclaimed scientist Lynn Margulis, and his three sons, as well as exclusive access to many personal papers, this captivating life story offers remarkable insight into one of the most influential, provocative, and beloved figures of our time.