The third novel in this series.Sadly, Tom Swift has given up on the governments of the world. After fifty years of trying to help mankind and being instrumental in setting up colonies on Venus, Mars, and numerous moons throughout the outer solar system, he and ten thousand colonist, family and former employees have left the home system forever.Their destination has been to explore the Pleiades star constellation with hopes of locating a new, human-friendly home planet. Along with them are the remnants of the dinosaur race he once thought of as his "space friends." The uneasy peace between them is softened by the fact their Prime Leader is a human.The only problem is that his bride, Phyllis Newton, is the human who has become the Prime Leader of the dinosaurs. She and their asteroid ship start out for the same place as Tom and his more conventional ship, but they soon are separated by millions of light years, and even by the sum total of time itself.As each group encounters new beings and new challenges, they find the universe is a pretty hostile place to be.