■■■ Book Introduction

Alpha Centauri, a triple star system with three burning suns
The Three-Body Civilization's star-star fleet sets sail for Earth.

“It is impossible for humanity to win this war.

“You are worms!”

Liu Cixin's "The Three-Body Problem," which became a sci-fi myth

Liu Cixin's "The Three-Body Problem", the first Asian novel to win the Hugo Award and establish himself as a science fiction master.
The trilogy of "Earth's Past," which consists of "Part 1 - The Three-Body Problem," "Part 2 - The Dark Forest," and "Part 3 - The Eternal Life of the Grim Reaper," boldly depicts the fate that humanity will face in a universe like the "Dark Forest" where countless dangers lurk.
As former US President Obama commented, “When I read ‘The Three-Body Problem,’ the scale of the work was so vast that the daily life in the White House felt trivial” (New York Times interview), the world constructed in ‘The Three-Body Problem’ endlessly expands toward the infinite universe.

In this way, The Three-Body Problem provides readers with a transcendental view of the universe based on the scientific theories the author accumulated while working as a computer engineer.
The Three-Body Problem is a science fiction epic that spans from the Cultural Revolution to the all-out war between extraterrestrial civilizations and humanity hundreds of years later. Part 1 - The Three-Body Problem depicts the fate of humanity as it encounters an extraterrestrial civilization by exchanging signals with a three-body world located four light-years away from Earth.
In Part 2 - The Dark Forest, the cosmic axiom that “civilizations constantly grow and expand, but the total amount of matter in the universe remains constant” is put forward, and it is said that in order to survive in a universe like the “Dark Forest,” a competition for survival with alien civilizations is inevitable.
In Part 3 - The Eternal Life of the Grim Reaper, humanity, having survived an all-out war with an alien civilization, comes face to face with a greater horror that exists in the universe, bringing the story to a close.
The boundless imagination that runs from Part 1 to Part 3 pushes essential thinking about the universe to the limit and allows you to experience intellectual pleasure.

This world has received your information.
I am a pacifist of this world.
I'm lucky I got your information first.
I warn you.
Don't answer! Don't answer! Don't answer!
(……) If you don’t answer, this world will not be able to determine the location of the transmitter.
But if you answer, the transmitter's location will be identified, your planetary system will be invaded, and your world will be occupied.
Don't answer! Don't answer! Don't answer!
---p.308 From "Part 1"

Three seconds later, the Three-Body World made its first contact with humanity outside of Earth's rebels.
Afterwards, they stopped communicating with the Earth Triad rebels' descending faction.
The Three-Body World did not send any information while all attendees were alive.
At this time, information appeared in the eyes of everyone in the operations center, as if Wang Miao had seen a countdown.
The information flashed briefly for about two seconds and then disappeared.
But everyone saw exactly what it said.
It was only six characters.
You are worms.

---From "Part 1" on page 433

“The Perfect Wall bearer will shoulder the most difficult mission in human history.
They must be completely alone and hide their inner world from the world and the entire universe.
The only person they can talk to and communicate with, and the only person they can rely on, is themselves.
They must spend long years in solitude carrying this great mission.
On this point, I express my deepest respect to the Perfect Walls on behalf of humanity.”
---pp.135~136 From "Part 2"

“The universe is a dark forest.
All civilizations are hunters with guns.
They are wandering through the forest like ghosts.
I quietly moved away the branches blocking the path, minimized the sound of my footsteps, and even lowered my breathing… … .
You have to be careful.
Because there are hunters hiding all over the forest.
(……) In this forest, other people are hell in and of themselves, an eternal threat.
Any life that reveals its existence must be immediately destroyed.
This is the cosmic civilization and the interpretation of the Fermi paradox.”
---p.677 From "Part 2"

If his brain were to fall into the hands of the Samcheans and be resurrected as Cheongsin had wished, it would be a true nightmare.
The cold-blooded aliens will experiment by attaching sensors to his brain and inputting various sensory inputs.
Of course, the sensation they are most interested in is pain.
They will make him experience sensations of hunger, thirst, violence, burning, suffocation, etc. in sequence, (……) and search his mind to find fear, and then they will instill in his brain the sensation of bandages being removed.

---pp.109~110 From "Part 3"

The light spot grew rapidly and transformed into an oval shape.
It was a two-dimensional plane.
The light emitted from that plane collided with the surrounding forest of buildings, splitting into numerous pillars of light and illuminating the people in the central axis.
Like a giant wheel with a hole in the bottom, the space city began to sink into the two-dimensional flat sea.

--- p.676 From "Part 3"