I love Carl Sagan, so for me this book is partially about finishing the canon of his works, and also partially to try and wrap my head around a scientific view of religious experience. If that floats your boat, you'll find this valuable, though not as amazing as his other works.
Love, love, love this book. Sagan encourages skeptical thinking as a way to avoid bullshit and the manipulative hold of charlatans. I wish this was required reading in our schools and churches, truly would protect a lot of people.
Sobering reflection on how inconsequential we are, populating just one tiny planet in the vast cosmos. But hey, reality check! He then paints a humanistic future, love Carl.