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Content snapshot
Flag an inaccuracy →What's in this book, at a glance — five things readers want to know before they start.
Violence
Some
Moderate; sci-fi violence and the existential stakes of a civilization-ending threat
Language
Barely any
Mild language
Sexual Content
None
No significant sexual content
Substance Use
Barely any
Mild; the social pressure of a world facing extinction
Emotional Intensity
A lot
Significant; the Dark Forest theory — the idea that silence is survival and communication is suicidal — is a profound and disturbing framework for thinking about civilization
What this book is about
The second Three-Body Problem novel develops Liu Cixin's universe with characteristic ambition — the Wallfacer Project assigns four individuals to develop secret strategies against the alien invasion, known only to themselves. Liu's novel contains some of the most compelling science fiction thinking of the 21st century, and the Dark Forest theory of cosmic civilization is one of the most haunting ideas in contemporary science fiction.
Notes for sensitive readers
Reader-flagged moments and themes that may affect your experience.
Existential sci-fi themes
Sequel — read Three-Body Problem first
Reader Verification
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