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

Go out and buy this book, because Carl Sagan is not only one of the world’s most respected scientists, he’s a great writer… . I can give a book no greater accolade than to say I’m planning on reading it again. And again. And again. -The Miami Herald

The brilliant astronomer … is persuasive, provocative and readable. -United Press International

Closely reasoned, impeccably researched, gently humorous, utterly devastating. -The Washington Post