This is Stephen Hawking's final gift to us, a book in which he answers some of the big questions facing this world. Will humanity survive? Should we colonize space? Does God exist? Hawking addresses these and other issues in this wide-ranging, passionately argued book. Anyone who reads this book will draw their own conclusions, but the message I came away with, was that he is optimistic over the fate of the human race, with science playing an integral part. A thoroughly thought-provoking book, that has to be read more than once to appreciate the thoughts of one of the most brilliant minds seen in history.