The Three-Body Problem is an award-winning space thriller mystery book written by Liu Cixin. It is the first book in the Remembrance of Earth's Past trilogy. The story begins during China's Cultural Revolution and follows a group of scientists as they uncover a secret military project that sends signals to an alien civilization. As the narrative unfolds, readers are taken on a journey that spans decades and explores the consequences of humanity's first contact with extraterrestrial life. The Three-Body Problem is a thought-provoking and intricately plotted space thriller that seamlessly blends science, philosophy, and mystery.