The Dark Forest (Chinese: 黑暗森林) is a 2008 science fiction novel by the Chinese writer Liu Cixin. It is the sequel to the Hugo Award-winning novel The Three-Body Problem in the trilogy titled "Remembrance of Earth's Past", but Chinese readers generally refer to the series by the title of the first novel. The English version, translated by Joel Martinsen, was published in 2015. The novel's title comes from the dark forest hypothesis, coined by Liu in the novel, but described by astronomer and author David Brin as early as 1983 as a possible solution to the Fermi paradox.
Plot
The UN forms the Planetary Defense Council (PDC) to coordinate defensive efforts against the impending assault of the Trisolarans, who have launched a massive invasion fleet that will reach Earth in around 400 years. However, subatomic semi-artificial intelligences sent from Trisolaris (the book's name for the three-star system of Alpha Centauri), known as sophons, have already reached Earth; these conduct surveillance of national secrets...