Like every beautiful thing in life, this series also has an end. Even though I really enjoyed this book compared to other Sci-Fi novels, this is my least favourite in the Trilogy. There are many, I mean MANY creative and impressive ideas and theories in the book. However, I feel like they are somehow rushed and not completed in a sense. Also, compared to Ye Wenjie and especially Luo Ji, Cheng Zi (our protagonist in this book) is not very appealing character. Don't get me wrong, I really enjoyed this book I am only comparing them to the previous ones.
Previously on Remembrance of Earth's Past...Luo Ji managed to fool Trisolarians and he now holds the switch to fate of both civilisations. In Deterrence Era, humanity advances its technology while monitoring Trisolarians constantly. Even though they have the switch, losing it would mean Earth's doom. Like my other reviews of the Trilogy, I will give you an extensive summary of the novel. You can read this before to understand the novel better if you don't care about what happens and want to learn every bit of detail yourself while having some general knowledge. You can also come back and read this review to understand the plot better. Without further ado, let's get started shall we?
Even though humanity has the upper hand now, they continue to monitor Trisolarians. In the committee, Cheng Zhi suggests the Stair Project. She believes that they can send a human to Trisolarian fleet to destroy it from within. Because of the capacity of the rocket, it can only carry a human brain. Cheng recommends Yun, her former classmate. Yun, at the time, had cancer and about to die accepts it as he also had a crush on Cheng. Before the operation, Yun gives Cheng a literal star as a gift. Luo Ji becomes the Swordholder as he holds the fate of both Earth and Trisolaris. People started to view Luo Ji as a dictator instead of a God. The UN decides to change the Swordholder and after some drama Cheng becomes the new Swordholder. Minutes after Cheng got the switch, Trisolaris Droplet launches an attack. Cheng cannot decide if she should hit the button or not. She panics and throws the button away. (Good job Cheng you just doomed humanity) Trisolaris ships destroy the button and eliminating every kind of hope humanity have. Trisolaris in now coming to take over this world and they relocate all humans to Australia. (We really don't know why Australia) When humanity was about to become slaves, one human spaceship, Gravity, reveals itself. The ship is equipped with a strong radio that can act as the button. It broadcasts the exact location of Trisolarians to the Universe as a revenge. Humanity monitor Trisolarian Planet getting destroyed by a higher civilisation. Just like smashing a bug Trisolarian planet was destroyed in a matter of seconds. (That's what you get for calling humanity bugs) Only few starships manage to escape the attack but since they communicated with Earth, humanity is still in danger. Trisolarian Sophon robot tells Cheng that Yun did not die and wants to see her. Yun was captured by their fleet and managed to delve deep into their society. Cheng and Yun's conversation is monitored by Trisolarians so one wrong word means Cheng's death and Earth's end. After chatting for a while, Yun tells Cheng 3 fairy tales. Those 3 fairy tales are indeed humanity's salvation. Humans decrypts the meaning of each story and try to devise a plan.
1- The Bunker Project
By building settlements at the back of Saturn and Jupiter humanity could survive the attack.
2- The Lightspeed Ship Project
By studying atomic propeller technology, humanity could try to build lightspeed ships in order to escape our solar system.
3- The Dark Void Project
By lowering the solar system's light speed, light would not exposed from our solar system. Solar System becomes something like a black hole so it shows no threat to other civilisations.
After a long discussion, humanity decide to execute all 3 of them. Cheng helps with building Lightspeed ships. Cheng becomes the company's head on one condition: if research threatens human lives she has to stop and confiscate company's power. Cheng goes into hibernation for 30+ years and finds that humans built many space settlements already. Even if the Sun is destroyed many people would survive. Also, there is huge improvement in Lightspeed ships. However, when lightspeed ships fly, it would create a space distortion leaving a trail behind. People believe that it will accelerate the exposition of Earth's coordinates. Also, it cannot carry large amount of people so the government bans the research on lightspeed ships. Victor, company leader, is arrested and executed leaving everything to Cheng. Soon, another God level civilisation Singer was passing through solar system and intended to use the Dimension Foil. This strike can turn a 3D system into a 2D, it's basically smashing a bug and turning it into flat. I want to add that the chapter named Bunker Era, Year 67 Orion Arm of the Milky Way is where we learn about Singer and it is probably the most impressive chapter of all. However, before Singer could act someone else used a Dark Forest Strike. "In the cosmos, no matter how fast you are, someone will be faster; no matter how slow you are, someone will be slower." Before the strike Cheng gets on a lightspeed ship that was hidden and escapes the solar system. Cheng and Ai AA escape to the star Yun gave her. There, they find Guan Yifan, a crew member of Gravity. Guan Yifan and Cheng leave to explore a nearby alien signal and AA tells that Yuan came to the planet. Before they could return, their ship is break down and they had to wait 16 days in hibernation. Because of the time dilation, 18 million years have already passed and both AA and Yun are already dead. They find a message from them carved into a bedrock, instructing them to enter a pocket universe. They want to wait for the destruction of the universe inside. However, a message by an unknown civilisation reveals that large amount of pocket universed have reduced the mass of the universe too much. If the mass is not returned to normal, there will be a big rip, no destruction and there will be no life in the kosmos. To save the main Universe from this fate, Cheng Xin and Guan Yifan return all the mass in the pocket universe to the main universe, and leave the pocket universe in a spaceship to explore. They leave behind only a small self-contained habitat for some small fish, and a computer drive with the contained knowledge of Trisolaris and humanity, to serve as a "message in a bottle" to future explorers after the Universe has finally been reborn. (hide spoiler)]
“If we lose our human nature, we lose much, but if we lose our bestial nature, we lose everything.”
Thanks for joining me in this ride.