3.5 stars.
The story seems intriguing, but it started slow. Still looking forward to read the next volume.
Loved all stories, but the last one was a real page turner, I finished it in around an hour!
Sagan made an awesome good case for embracing scientific skepticism, while pointing out its short-comings when deciding moral values over scientific data that might be used to advance unethical practices. The only thing that bothered me, personally, was the overtly acceptance of religion as a complementary way of advancing our spirituality (whatever that means).
Such a page turner. Building up constantly, without interruption, until the (even more) exhilarating climax, which (fortunately) I was able to read in one sitting, letting me enjoy it along with the conclusion in one single reading session.