This book was the third Sagan book I read (the first was Demon-haunted world followed by Cosmos) and certainly, it is a most. Sagan portraits the future of mankind as a hopefully, brilliant one. A future that has been, and still is, the dream of science fiction writers (and readers like me) for years. It is hopefully to know that there are scientists who take that picture seriously and encourage readers to believe that it is possible as long as we want it to be possible. But of course, Sagan snaps us in the back and reminds us the dangers the technologies that might make that dream come true will pose us if we are foolish enough to misuse them. And makes us think about the state of humankind and, despite the fact that "the Universe wasn't made for us" -as he put it- to remember how precious, unique and importat we are. The Universe might be crowded of all kinds of intelligent life. But certainly, there is only a human race. This book made me remember a quote by Isaac Asimov: "The future of humanity is in the stars, and that future is to bright to be lost by dumb and ignorant superstition." Two years and a half after Sagan's death, I still miss him.