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For centuries, humans have looked up at the stars wondering if there are creatures “like us” out there. Science fiction authors have offered cautionary advice: “careful what you wish for.” What if extraterrestrials are a little too like us? I.e. homicidal resource guzzling maniacs with an innate drive to expand and control? If aliens are indeed enlightened, they’re probably smart enough to leave murder-primates like us alone. If they’re not, then human civilization might soon get a taste of its own killer medicine. Here are the 10 best sci-fi books about alien invasions, written so wishful thinkers like you can start preparing for interstellar combat instead.

The Three Body Problem

A modern sci-fi war epic, Cixin Liu’s The Three Body Problem is one of the most celebrated alien invasion books of the modern era. Book one of the Remembrance of Earth’s Past trilogy, Liu’s novel takes its title from a problem that has plagued physicists for centuries. When three or more celestial bodies are in orbit around each other, their movements are nearly impossible to predict. When you’re an alien species living on a planet that orbits three suns, solving the three body problem isn’t just a theoretical conundrum – it’s the key to your survival. The solution? Abandon your planet and look for a more hospitable place. That blue one a few lightyears away looks pretty nice – if you were to get rid of the organisms already living on it. Trouble is, those inconvenient organisms are us, and we now alien invasion on its hands! Hard problems call for hard solutions, and this hard sci-fi novel packs a hard hitting punch.