An excellent SF writer and an astronaut join forces to write a novel. While you might think that this is merely a cash-in on each other's names, the novel is, in fact, very good. A believeable tale about one species trying to find a new home, and another (us) trying to find the first. The story is realistic, with Buzz Aldrin's experience in aeronautics bringing all the required techno stuff. While the pair are prone to info-dumping, this in no way mars the story. However, I don't think that there is any room for a sequel, and if they did squeeze one in, it wouldn't be anything compared to its predessecor. Once this is available again, buy it.