A fascinating book on the joys of discovering how the world works, by the Pulitzer Prize-winning author of Cosmos and Shadows of Forgotten Ancestors.“Magnificent . . . Delightful . . . A masterpiece. A message of tremendous hope for humanity . . . While ever conscious that human folly can terminate man's march into the future, Sagan nonetheless paints for us a mind-boggling future: intelligent robots, the discovery of extraterrestrial life and its consequences, and above all the challenge and pursuit of the mystery of the universe.”-Chicago Tribune