A few months ago, I read The Three-Body Problem by Liu Cixin, and I found it a particularly impressive and riveting work of science fiction. So, I decided to read the second book in the series, which definitely met my expectations on a Liu Cixin work.

This book is the sequel to the Three Body Problem, so to understand the context and setting of this novel, one must have read the previous book. This book is situated under a pretext like the Three Body Problem, but this time focuses on humanity’s survival in the face of the Trisolarian invasion. This book mainly focuses on the efforts of the UN to find a way for humanity to survive, most notably through the Wallface project, granting several individuals great power. This was to counter the “Sophons” the Trisolarians used, a particle that disrupts advancements in physics, while at the same time communicating with Trisolaris via quantum entanglement, which is a theory in physics detailing a phenomenon where two subatomic particles can communicate with each other despite being separated by billions of lightyears of space.

This book was significantly interesting to me, as it is one of the more notable works in the hard science fiction genre of novels. “hard science fiction” defines any science fiction novel that puts an emphasis on scientific logic and realism. The Dark Forest, along with the rest of the Three-Body series, includes both of these things. More interestingly, the Dark Forest is based on a real scientific hypothesis, the “dark forest hypothesis”, which states that the universe contains intelligent alien life, but no advanced civilization would reveal themselves out of the fear of being attacked.

Overall, this was a great sequel to The Three-Body Problem, and I had a great time reading it. I would recommend this book and the corresponding series to anyone who is interested in physics, or anybody looking to read a science-fiction novel with a realistic depiction of scientific concepts.

The Dark Forest by Cixin Liu is available to download for free from Libby.