Unfortunately, I was a bit disappointed by this. Space exploration is a really interesting topic, but I found this book very dry, almost like reading a textbook. There were also far too many tangents discussing side topics. For example, the first 3 chapters discuss evidence for life on other planets and threats to life on ours. This would be a fine 10 page introduction to the topic, but instead it drags on for 130 pages, which I found completely excessive.

The book is supposed to be about humans living in space, but the book spent much less time on this than I would have liked. Part 2 is focused on potential places humans could live and part 3 is how we might travel there, but I was hoping for a deeper discussion of what life would actually be like in these space colonies. The fundamental question of whether it is even possible remains unresolved, as the author gives possible methods and some flaws with them, but doesn't draw conclusions.