Alien: Echo is a novel written by Mira Grant. It was first published in 2019.
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The first young adult novel in the Alien franchise, Echo is set on the planet Zegreus, home to a human agricultural colony that becomes the site of a Xenomorph outbreak. The protagonist, a young woman named Olivia Shipp, relies on knowledge of xenobiology taught to her by her parents to get her and her twin sister Viola offworld alive.