The Quiet Invasion — Sarah Zettel

Venus, second planet from the Sun, is a lonely sphere of lethal heat, deadly pressure, and poisonous winds. Yet mankind still explores it for signs of life. When an abandoned alien outpost is discovered on Venusian soil, Dr. Veronica Hatch is sent to investigate. What she discovers is extraordinary -- an alien race has escaped its dying and distant world to colonize Venus, the only planet that can support it. But back on Earth, this news is received with dread. Fearing the aliens will invade and conquer the entire solar system, Earth prepares for war. It is now up to Veronica to urgently convince the aliens that mankind is truly worth saving -- before Earth becomes ground zero of an interstellar war.