Solid Exposition Of The Topic. There really isn’t much more to say about this particular book. If you’re interested in the future of humanity at all, particularly our future as a space faring / multi-planet species, you need to read this book. If you’re interested in the potential for finding or communicating with non-Earth lifeforms, you need to read this book. In both of these arenas, Impey does a solid job of explaining the history of the relevant sciences, where they have been recently, where they are projected to be within the next generation or so, and what it would take to actually get or communicate with… much of anywhere, really. While exoplanets – planets beyond our local solar system and even beyond our own galaxy – are the main discussion, there are some discussions of the possibilities of life beyond Earth even within our local system that are also quite realistic, even including potential timeframes for when this could happen. Wow, I’ve actually said more about this book than I thought I would. 🙂 In short, read this book and learn a thing or two. Unless you happen to be an astrophysicist specializing in exoplanets already. 😉 Very much recommended.