Where are we as people going and how are we going to get there? Scientifically speaking we are doomed. It may take a million, a billion, or even several billion years but eventually the collection of knowledge and all the great things that people have been doing since they showed up on earth will be gone.
Does it have to be that way? The characters in this book may have found a means in which all the knowledge mankind has been collecting can be preserved and maybe even "mankind" itself.