Name: The Dark Forest
Rating: 4.479942693409742 (349 reviews)
ISBN: 9781784971588

Liu Cixin

The universe is a forest, patrolled by numberless and nameless predators. In this forest, others are hell, a dire existential threat. Stealth is survival. Any civilisation that reveals its location is prey. Earth has. And the others are on the way.

The Dark Forest

Laura Dobie

Naomi J.

Don't say where we are! Once we know where we are, then the world becomes as narrow as a map. When we don't know, the world feels unlimited.

Jasper

'Keiko, come with me to the end of days,' Hines murmured.

The insects in the grove seemed to have grown accustomed to their presence and resumed their musical chirping. When a soft wind blew through the bamboo and the stars in the night sky flashed through the gaps between the leaves, it was as if the insect chorus were issuing from those stars.

You're like the blank space in a traditional painting: pure but, to a mature appreciation, infinitely appealing, he thought as he looked at her.

'Yan Yan, she's not as beautiful as you. That's the truth.' He also wanted to say, One might be able to find her beauty among these works of art, but yours eclipses them, but he didn't want to come off as sarcastic 

As the elderly passed away, the departed Golden Shore vanished into the smoke of history. The ship of human civilization floated alone in the vast ocean, surrounded on all sides by endless, sinister waves, and no one knew if there even was an opposite shore.

"If I destroy you, what business is it of yours?"

I only wish to discuss with you one possibility: Perhaps seeds of love are present in other places in the universe. We ought to encourage them to sprout and grow.

ikkychan

Liu Cixin’s The Dark Forest, the second book in the 
 Remembrance of Earth’s Past
 trilogy, is a wild mix of speculative science, political maneuvering, and a heavy dose of cosmic horror. Building on the mysterious groundwork of 
 The Three-Body Problem
, this sequel dives deeper into the series’ big philosophical questions and presents a terrifyingly logical view of the universe. It’s ambitious, packed with ideas, and often brilliant—but it also stumbles when it comes to its characters, especially its portrayal of women. At the center of the novel is the “Dark Forest” hypothesis, Liu’s answer to the Fermi Paradox. It paints the universe as a dangerous place where every civilization hides in fear, knowing that revealing itself could lead to destruction. In this universe, survival means silence. It’s not a hopeful vision of alien contact—it’s a warning. The chilling logic behind this idea, where every interaction is potentially fatal, echoes real-world fears and even mirrors Stephen Hawking’s own caution about broadcasting Earth’s presence. What really sets this book apart is Liu’s imaginative use of science. Sophons—four-dimensional particles used to spy on Earth—space elevators, planet-scale deception, and cryogenic sleep all make appearances, and they’re not just window dressing. These ideas are woven into the story’s fabric in a way that feels plausible and purposeful. The Wallfacer Project, for example, is a brilliant concept: four people are given the power to plan humanity’s survival in total secrecy. It turns the usual sci-fi arms race into a mind game, a battle of hidden strategies and psychological warfare between Earth and the Trisolarans. Luo Ji, the most reluctant and unconventional of the Wallfacers, becomes a key player in this cosmic chess match. The narrative structure adds even more tension. Inspired by classic Chinese literature like Romance of the Three Kingdoms, the book is full of betrayals, long cons, and strategic backstabbing. The political intrigue stretches across centuries, made possible by characters freezing themselves in cryo-sleep. One of the most unforgettable moments is the Doomsday Battle, where Earth's supposedly advanced space fleet is wiped out in a matter of seconds. It's brutal and shocking—one of those scenes that sticks with you long after you've finished reading. But for all its big ideas, the novel struggles with character development. Luo Ji’s journey—from aimless academic to humanity’s savior—is interesting in theory, but undercut by a cringey subplot involving a dreamlike ideal woman who is later cryo-engineered into existence. His “love story” with Zhuang Yan feels hollow and even misogynistic. She’s barely a character—more like a symbol of Luo Ji’s desire for a perfect life. Liu leans on tropes here, and it doesn’t help that most of the female characters are either sidelined or exist to serve the development of male leads. Zhuang Yan, in particular, becomes a textbook example of “fridging”—a woman character whose death or disappearance is used to motivate a man. Dialogue in the novel also tends to be stiff and overly explanatory. Characters often sound like they’re reading from a philosophy textbook rather than having a real conversation. This makes it hard to connect with them on an emotional level. The result is a book that’s intellectually engaging but emotionally distant. The structure of the story doesn’t always help either. The use of cryo-sleep allows Liu to explore events over hundreds of years, but it can make the pacing feel uneven. The first half is particularly slow, bogged down with exposition and setup. And while the Wallfacer concept is fantastic on paper, its execution isn’t consistent. The Wallbreakers, the supposed enemies of the Wallfacers, don’t really live up to their potential—they’re more plot devices than actual characters. Still, thematically, the novel is rock solid. It explores deep existential fears—about being noticed, about annihilation, and about how civilizations might behave under extreme pressure. The idea that any noise in the universe could invite death is genuinely terrifying. As Luo Ji puts it: "The universe is a dark forest. Every civilization is an armed hunter stalking through the trees like a ghost..." It’s a metaphor that hits hard and stays with you. Some characters do shine. Zhang Beihai is a standout—his calm determination to ensure human survival no matter the cost gives the story a darker moral edge. Da Shi, the no-nonsense cop from the first book, returns as a fan favorite. He’s grounded and practical, offering a much-needed counterbalance to the novel’s big, abstract ideas. Despite that, the book’s lack of meaningful female roles makes it feel outdated, especially in a genre that’s been steadily pushing for more diverse voices. It's an area where Liu's imagination doesn't quite keep up with the times. Despite its flaws, The Dark Forest is a bold and thought-provoking piece of science fiction. It pushes the genre forward with its mix of strategy, philosophy, and terrifying ideas about what’s out there in the universe. It may not be perfect—it’s dense, uneven, and emotionally distant at times—but it’s unforgettable. Liu Cixin has created a terrifying mirror, not just for how we might respond to alien life, but how we respond to fear, power, and the unknown.

Soon to be a Netflix Original Series! "Wildly imaginative." —President Barack Obama on The Three-Body Problem trilogy This near-future trilogy is the first chance for English-speaking readers to experience this multiple-award-winning phenomenon from Cixin Liu, China's most beloved science fiction author. In The Dark Forest, Earth is reeling from the revelation of a coming alien invasion-in just four centuries' time. The aliens' human collaborators may have been defeated, but the presence of the sophons, the subatomic particles that allow Trisolaris instant access to all human information, means that Earth's defense plans are totally exposed to the enemy. Only the human mind remains a secret. This is the motivation for the Wallfacer Project, a daring plan that grants four men enormous resources to design secret strategies, hidden through deceit and misdirection from Earth and Trisolaris alike. Three of the Wallfacers are influential statesmen and scientists, but the fourth is a total unknown. Luo Ji, an unambitious Chinese astronomer and sociologist, is baffled by his new status. All he knows is that he's the one Wallfacer that Trisolaris wants dead. The Three-Body Problem Series The Three-Body Problem The Dark Forest Death's End Other Books Ball Lightning Supernova Era To Hold Up The Sky (forthcoming) At the Publisher's request, this title is being sold without Digital Rights Management Software (DRM) applied.

Shawn Camp

The thought process on developing this book and the other two books in the series is just so detailed and amazing.

This near-future trilogy is the first chance for English-speaking readers to experience this multiple-award-winning phenomenon from Cixin Liu, China's most beloved science fiction author. In The Dark Forest, Earth is reeling from the revelation of a coming alien invasion-in just four centuries' time. The aliens' human collaborators may have been defeated, but the presence of the sophons, the subatomic particles that allow Trisolaris instant access to all human information, means that Earth's defense plans are totally exposed to the enemy. Only the human mind remains a secret. This is the motivation for the Wallfacer Project, a daring plan that grants four men enormous resources to design secret strategies, hidden through deceit and misdirection from Earth and Trisolaris alike. Three of the Wallfacers are influential statesmen and scientists, but the fourth is a total unknown. Luo Ji, an unambitious Chinese astronomer and sociologist, is baffled by his new status. All he knows is that he's the one Wallfacer that Trisolaris wants dead. The Remembrance of Earth's Past Trilogy The Three-Body Problem The Dark Forest Death's End Other Books Ball Lightning (forthcoming)

M. Sosotris

This book was outstanding. You really need to stick with it to get what it’s doing, but the payoffs throughout the story are just so satisfying.

Battle of Darkness is simply astonishing! 

"The birth of a new civilization is the formation of a new morality"

Ricky

Battle of Darkness is simply astonishing! 

"The birth of a new civilization is the formation of a new morality"

although much larger in scope, this volume deals less with questions for philosophy and acts more a vehicle for his singular theory of the dark forest. it is written like a thriller, with hard sci-fi elements owing to his background as an engineer.

it continues to deal with the ramifications of the knowledge of certain existential risk and how humans would react to it.

im also surprised that it does not have authoritarian streaks, and instead brings to the fore ideals of liberalism and individualism.

themes now depart from questions of the philosophy of science in the first book to that of cosmic game theory, presenting a (then, at the date of publication, 2008) novel answer to the fermi paradox (in which the fertility for life in our universe is paradoxical as there are no other signs of intelligence other than ourselves) in the dark forest theory. this theory posits that civilisations are merely hunters in a dark forest, inching through slowly and once a rustle or signs of life or threats appear, the optimal solution is to attack whatever is sensed. the same logic applies to the rest of the forest in relation to the hunter -- it is at its core a pessimistic and bad-faith strategy -- but liu presents an optimistic possible solution

very breezy and well-paced book! almost didnt read it because of its length and complaints online that it was a bad translation. i disagree. the book is also bookended very nicely down to the first and last paragraphs, and also does a neat callback to the last scene of the first book

this second volume absolutely does live up to the hype

Ghee

although much larger in scope, this volume deals less with questions for philosophy and acts more a vehicle for his singular theory of the dark forest. it is written like a thriller, with hard sci-fi elements owing to his background as an engineer.

it continues to deal with the ramifications of the knowledge of certain existential risk and how humans would react to it.

im also surprised that it does not have authoritarian streaks, and instead brings to the fore ideals of liberalism and individualism.

themes now depart from questions of the philosophy of science in the first book to that of cosmic game theory, presenting a (then, at the date of publication, 2008) novel answer to the fermi paradox (in which the fertility for life in our universe is paradoxical as there are no other signs of intelligence other than ourselves) in the dark forest theory. this theory posits that civilisations are merely hunters in a dark forest, inching through slowly and once a rustle or signs of life or threats appear, the optimal solution is to attack whatever is sensed. the same logic applies to the rest of the forest in relation to the hunter -- it is at its core a pessimistic and bad-faith strategy -- but liu presents an optimistic possible solution

very breezy and well-paced book! almost didnt read it because of its length and complaints online that it was a bad translation. i disagree. the book is also bookended very nicely down to the first and last paragraphs, and also does a neat callback to the last scene of the first book

this second volume absolutely does live up to the hype

Finished the second book of the Three-Body Problem series… :") I honestly didn’t expect the storyline to be like this. It’s filled with the ambition of all humanity, each trying to save the world in their own way. So many conflicts, successes, failures… it felt utterly hopeless at times. As a reader, I could deeply feel every emotion poured into this book. It truly embodies the phrase “light will shine even in the darkest times,” or something like that. The main takeaway? Nothing is impossible if you have faith in what you’re doing—HAHA. By the end, I was so moved… :") Sad, but deeply touched!!!

div. ☆

DAMN SLOW BURN 😭😭😭 im glad i got to the end. as always, the battle scene was insane. my heart sank and it actually instilled a sense of hopelessness in me. will need a break before going in to the last book of the trilogy!! 

veralyn

This book is absolutely insane and I mean that in a good way - I don’t think I’d ever forget it. Even better than Three Body

Valerie Yang

Eva Ströberg

I must admit that Liu Cixin is a genius. I have never encountered sci-fi books that is so intriguing like this trilogy.

By the time you read this book, I'm sure that you have read the Three Body Problem. This book continues what's left from the first book, fast forwarded almost to the the time close to Trisolaris' arrival on earth.

There were times when I skipped through the long passages, I think it's common in many Asian-authored narration that there are usually long and winding conversation, but be patient and you'll be rewarded with the most interesting stories. I can't wait to get my hand on the 3rd book

The highest praise I could ever give the second book in a trilogy - this far surpassed its predecessor.

Wingyan Chan

Do you know what the greatest expression of regard for a race or civilization is?

That’s the highest respect a civilization can receive.

Nate

Do you know what the greatest expression of regard for a race or civilization is?

Annihilation.

That’s the highest respect a civilization can receive.

Malcolm Reddoch

Better than the first, which is REALLY saying something. One of the best, most gripping books I’ve read in quite a long time. Cannot recommend highly enough.

Chaitanya Baranwal

** spoiler alert **
           While this book was not at par with the first book in terms of wittiness, it certainly made up for it in characterization, both of its human characters and of human society as a whole. I could imagine Luo Ji spending time with his imaginary lover, and I could also imagine the mystery behind the character of Zhang Beihai. In my opinion, the characterization itself made the second book better than the first one.

The entire concept of Wallfacers, in addition to the impending doom of the Trisolaran army, kept me gripped to the story, making me want to read more and know how things will turn out. The idea of cosmic civilization actually impressed me, and if there is one thing I would take away from this book, it would be this interesting concept. The book does give a believable idea into what humanity's future can be like, which is commendable given how there is a great chance of things going overboard and the storyline coming up with absurdly amibitous ideas. My only concern with this book was its rushed ending, and I guess the thinking and idea behind Luo Ji's "masterplan" could have been elaborated more. Regardless, a fun and thought-provoking read!

Rohit Arondekar

Slow pacing and the weird concept of Wallfacers/Wallbreakers had me wondering if the second book will be a letdown. It wasn't! The books a real page turner towards the end.

This second book in the trilogy opens up the exploration of humanity, faith vs. despair, a thought experiment about the changes to society that extreme threats and turmoil can bring. I feel that the first book laid the foundation so that in this book, the ideas and future speculation could just take off. If you did not love the first book and weren't sure about continuing, give this book a try because it brings in new ideas and goes some places you might not expect. When it finally gets to the proposal of the dark forest theory and what it means to be a sentient species in space, it is terrifyingly dark.

This book mainly follows Luo Ji, a gifted but complacent astronomist who then turned to sociology. This character gets more development than any of the characters in the first book and even goes through a character arc. Still, the book is about themes and ideas, not character focused narrative. Luo Ji, drifting through life, suddenly finds himself shocked to be chosen by the UN for an international program to try and defeat the Trisolarans. A position he does not want and tries to reject, but cannot.

 this war, technological advantage is impossible for humans, due to the interference of the sophon probes. Trisolaran society does not understand deception because they have a completely transparent mode of communicating with each other. Secrets and strategic tactics that require misdirection are impossible for them. Humanity appoints four Wallfacers, to create plans entirely in their own brains and not communicate them in any way to any other person. They are given nearly unlimited resources and international criminal immunity for any actions or orders they give in the process of enacting their plans, along with creating red herrings to obscure what they are really doing. The ETO, humans who support the Trisolarans, appoint a Wallbreaker for each Wallfacer. They will observe and attempt to discover the true intentions of their Wallfacer and reveal the hidden plan, thus making the strategy useless.

We get to jump far forward in time, thanks to hibernation technology. We see the changes that have happened and the effect of the Trisolaran crisis on society and government. The plot feels like a techno thriller sometimes and especially in the second half moves at a good pace.

Cheryl Hedlund

This second book in the trilogy opens up the exploration of humanity, faith vs. despair, a thought experiment about the changes to society that extreme threats and turmoil can bring. I feel that the first book laid the foundation so that in this book, the ideas and future speculation could just take off. If you did not love the first book and weren't sure about continuing, give this book a try because it brings in new ideas and goes some places you might not expect. When it finally gets to the proposal of the dark forest theory and what it means to be a sentient species in space, it is terrifyingly dark.

This book mainly follows Luo Ji, a gifted but complacent astronomist who then turned to sociology. This character gets more development than any of the characters in the first book and even goes through a character arc. Still, the book is about themes and ideas, not character focused narrative. Luo Ji, drifting through life, suddenly finds himself shocked to be chosen by the UN for an international program to try and defeat the Trisolarans. A position he does not want and tries to reject, but cannot.

In this war, technological advantage is impossible for humans, due to the interference of the sophon probes. Trisolaran society does not understand deception because they have a completely transparent mode of communicating with each other. Secrets and strategic tactics that require misdirection are impossible for them. Humanity appoints four Wallfacers, to create plans entirely in their own brains and not communicate them in any way to any other person. They are given nearly unlimited resources and international criminal immunity for any actions or orders they give in the process of enacting their plans, along with creating red herrings to obscure what they are really doing. The ETO, humans who support the Trisolarans, appoint a Wallbreaker for each Wallfacer. They will observe and attempt to discover the true intentions of their Wallfacer and reveal the hidden plan, thus making the strategy useless.

We get to jump far forward in time, thanks to hibernation technology. We see the changes that have happened and the effect of the Trisolaran crisis on society and government. The plot feels like a techno thriller sometimes and especially in the second half moves at a good pace.

There were a lot of bait-and-switch twists in this book, but they all pretty much followed the same pattern. It got old after the first few twists of the same type, so I think this book was pretty boring despite all the action and space fighting. I'll probably wait a while before I read the third book since I have higher priority books to get to now. At least I know what folks are talking about when they discuss this trilogy, though! 

Ashlyn

This series is so weird, and the pacing frustrates me a lot, but the ideas are utterly gripping. A sci-fi book based on sociology and the prisoner’s dilemma was always going to appeal to me. I liked the unusual look at what makes a hero, too. The brilliant (if a bit unbelievable) ending makes me want to re-read the whole thing, but it’s 23 hours long and frustrating at times, so I probably won’t :P But I’m intrigued enough to finish the series! Fascinating stuff.

Bouke van der Bijl

** spoiler alert **
           Suspenseful and exciting, and at the same time heavy enough that you need to put it down after a while. The idea of the dark forest was explored nicely, and it’s a fun thought that utter annihilation of our solar system could be only a single transmission away.

Obada Mu

“No, no. Don't say where we are! Once we know where we are, then the world becomes as narrow as a map. When we don't know, the world feels unlimited.”

Eva Decker

** spoiler alert **
           I wish I liked this book more than I did.

The pacing grates; the plot doesn’t really get going until page 200 or so. Meanwhile, technological breakthroughs and huge historical advancements are skimmed over with only the barest detail.

The treatment of women throughout the book had me constantly thinking “ah yes, this was written by a man.” Amongst a massive cast, there are few female main characters. Many statements reduce women to their looks. Our protagonist / “mouth of God” character fails to acknowledge Ye Wenjie, the woman who at the start of the book introduces him to the breakthrough which ends up saving human civilization. And don’t get me started on the 100 pages of Luo Ji’s fantasy-girlfriend-come-to-life wife. Sooo cringey and dehumanizing. 

The last 200 pages of the book were more fun, but I found myself having to re-read passages multiple times to understand what was happening. This didn’t happen much in The Three-Body Problem, which makes me wonder if it is an issue with this book’s new translator. 

Characters felt flat throughout. Often felt myself unmoved over real or threatened character deaths. No matter how innovative the sci-fi concepts, a story doesn’t compel if all characters sound the same.

Considering how much I enjoyed The Three-Body Problem, disappointed. Onto Death’s End...

Kwan Ann Tan

This was good & definitely a deeper exploration of the human psyche in the face of potential total destruction, but there were too many illogical things that happened in the middle of the book & left me feeling a bit like Liu was creating despair for the sake of despair... 

Also I started off hating Luo Ji but then eventually I was just like damn, let the man enjoy his life with his weird dream wife and child

linda

I wanted to give this book three stars when I first started it. Martinsen’s translation lacks the poetic quality of Liu. He is stingy with figurative language, and I did not experience the same emotional connection with the characters. However, the plot drive me forward. By the time I was 350 pages in, I was intent upon giving the books four stars. After the Battle of Darkness and Luo Ji realization of the dark forest, the book won my heart.

Again, Cixin Liu weaves a masterful and vivid tale. I finished this book within two days of starting it, initially as an escape, but then I realized how engrossed I was by the plot. This book made me the dig deeper. What happens when the entirety of humanity has an existential crisis? Why do we prevail in the face of a losing battle? What are the dangers of the advent of technology? (That part about all the assassination attempts on Luo Ji made me fearful of my Amazon Alexa and other “smart home” devices). What is the true meaning of love? At the same time, this book made me realize how grateful I am for the life I have now. As improbable as an intergalactic war is, I felt awe for living in humanity’s “golden age,” with freedom, (relative) equality, limited pollution, and no food rationing. 

The Wallbreakers were a really interesting concept overall. It seemed ironic that their visions would be so twisted and dark, each positing the belief that humanity was doomed. Yet the survival of earth hinged on them. Reading about the doomsday battle and the scene when Ding Yi first touches the probe, I felt heartbroken, but not at all surprised. The part about Luo Ji falling in love with an imaginary character to truly loving her was also fun to read. I was also inspired by Zhang Beihai’s stoicism and tactical brilliance. 

Need I say that I am officially a science fiction convert?

Anne 

Captivating work of innovation, revelation, and compassion. 
Cixin Lui is a unparalleled visionary.

The Dark Forest

Reviews

Highlights