The Three-Body Problem is a captivating space thriller mystery book written by Liu Cixin. The story takes place in both present-day China and during the Cultural Revolution, following a group of scientists who discover that Earth is under the threat of an alien invasion. As they try to decipher the enigmatic messages sent by the alien civilization, they uncover a conspiracy that spans across time and space. With its intricate plot, rich scientific concepts, and exploration of human nature, The Three-Body Problem has gained international acclaim and is a must-read for fans of space mysteries.