Canonical Alien Trilogy Novels

As a child Chris Hooper dreamed of monsters. But in deep space, he found only darkness and isolation. Then, on planet LV178, he and his fellow miners discovered a storm-scoured, sand-blasted hell - and trimonite, the hardest material known to man. When a shuttle crashes into the mining ship Marion, the miners learn that there was more than trimonite deep in the caverns. There was evil, hibernating - and waiting for suitable prey.

As a deputy commissioner for the ICC, Alan Decker’s job is to make sure the settlements on LV178 follow all the rules, keeping the colonists safe. But the planet known as New Galveston holds secrets, lurking deep beneath the toxic sands dubbed the Sea of Sorrows. The Weyland-Yutani Corporation has secrets of its own, as Decker discovers when he is forced to join a team of mercenaries sent to investigate an ancient excavation. Somewhere in that long-forgotten dig lies the thing the company wants most in the universe - a living Xenomorph. 

When Ellen Ripley finally returns to Earth, she learns that the planet LV-426 - now called Acheron - has been colonised. 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. Two such residents are Anne and Russell Jorden, seeking a fortune that eluded them on Earth.