ALIEN: River of Pain (Book 3)

When Ellen Ripley finally returns to Earth, she learns that the planet LV-426 - now called Acheron - has been colonized. But LV-426 is where Ripley and the crew of the Nostromo found the original Xenomorph - the killing machine known as the Alien. Protected by the Colonial Marines, the colonists seek to terraform the storm-swept planet.