This is slightly expanded in Pale Blue Dot, though maybe half of the rest of the book serves as an interesting comparison of what Sagan thought might happen and

This is slightly expanded in Pale Blue Dot, though maybe half of the rest of the book serves as an interesting comparison of what Sagan thought might happen and what actually happened with space missions that were not complete at the time of book publication. Disappointingly, the audio book only has portions narrated by Sagan probably due to his cancer.