If I haven't mentioned it before, let me iterate that I love Carl Sagan; I've even said that my first born child will be named after him.
While this was dry in some places, which was unusual for Sagan, it was a fantastic work nonetheless. I found it very interesting that astrophysics could potentially solve a lot of problems with finite resources such as mineral deposits once we find a cheaper method of doing the thing that solves it. It was also pretty cool that he went into why NASA is so important to humanity as a whole.
I strongly recommend this book to people who love science as well as to those who don't understand why NASA is still around.