Alien: Echo is a 2019 young adult novel, written by Mira Grant and published by Imprint. It is set on the human colony world of Zagreus, which becomes the location of a violent Xenomorph outbreak. Olivia Shipp, the daughter of a pair of xenobiologists, is caught in the middle of the mayhem and works to both survive and make it offworld with her sister, Viola. The book was released in hardcover on April 9, 2019; a paperback edition is due to be released on April 7, 2020.
Olivia and her twin sister Viola have been dragged around the universe for as long as they can remember. Their parents, both xenobiologists, are always in high demand for their research into obscure alien biology.
Just settled on a new colony world, they discover an alien threat unlike anything they've ever seen. And suddenly the sisters' world is ripped apart.
On the run from terrifying aliens, Olivia's knowledge of xenobiology and determination to protect her sister are her only weapons as the colony collapses into chaos. But then a shocking family secret bursts open ― one that's as horrifying to Olivia as the aliens surrounding them.
The creatures infiltrate the rich wildlife on this virgin colony world ― and quickly start adapting. Olivia's going to have to adapt, too, if she's going to survive...