I picked up this novella through a humble bundle a while back. It's okay, but kind of frustrating. Aliens have made landed on Earth, and geneticist Marianne Jenner and her adult children are at the center of events, as it's revealed that the aliens are humans taken from Earth 70,000 years ago, and that both cousin species must worth together to find a cure to an alien plague that threatens them. There's skepticism, panic, violence, and deceit, and at the end a brutal betrayal. This novella feels like it's Frankensteined out of the corpses of more interesting scifi concepts, and never really come together, though apparently it forms the basis of a trilogy.