Not my usual cup of tea as I'm a huge scaredy cat and some of the worlds were super creepy, but overall I really enjoyed following along our main characters as they solved each world.
The premise of the story is very innovative; I don't think I've read anything quite like it before. Our MC, Lin Yi, is admitted to the Unnatural Engineering University, a university with odd rules right from the start. The admission notice comes with a campus rulebook, a book that becomes very important as the environment of the university is explained. Turns out that there are monsters on campus, and each of them corresponds to a rule in the rulebook. Each monster has their own rule world, and students can be sucked into the world via a specific set of circumstances, such as being around an open window or getting your shoes stuck in cement. Once they're in the world, they have to figure out the main plot line of this rule world and also who the monster is (it takes over one of the student participants and guides other students to break the rules of the world) in order to escape. It's kind of like what would happen if you combined a super realistic escape room, one where participants can die, with Werewolf or Mafia. What an interesting concept!
Some of the monsters' rule worlds have been resolved, i.e. students have already gone in and figured out the storyline, so these can be easily avoided. For example, previous generations resolved one monster rule where if you start sinking in cement, you have to take off your shoes and run away to prevent getting sucked into the world. Or another example is that hot water is only available during certain hours, otherwise there's a chance you may get sucked into a different rule world. Even though the students find themselves constantly at risk, they've become more organized over the years and there's a student council that helps protect the regular students. Our ML and the president of the student council is Qin Zhou, who has demonstrated a strong ability to resolve rule worlds.
Most of the story focuses on exploring the various rule worlds alongside our two main characters. The premises for each greatly differ, ranging from a psychiatric hospital to a haunted villa to a city dealing with a serial killer, and I enjoyed learning about each world through the eyes of our protagonists. Later on, the story shifts a bit more to delve into the MC's history and why he went to the Unnatural Engineering University to begin with, and the romance eventually starts as well. Even though the story is a longer one with 200+ chapters, and each chapter is fairly long, I was fully engaged and never bored. It's definitely a page turner; I stayed up late reading multiple nights in a row because I had trouble putting the story down.
Heed the horror tag for this book, as some of the worlds are super creepy, and inevitably there are always some gory deaths. The author does an amazing job of building up the creepy ambiance, for example the MC will often hear sounds of something outside his door coming for him or he'll hear screaming from a neighboring room as someone is killed. The sense of suspense is strong too. I'd say the first world was the creepiest for me and had me second guessing whether to keep reading, but the rest of them weren't as bad, luckily. Otherwise I don't think my heart would've survived!
Our main characters are both super smart, so it was a pleasure to follow along and see how they resolve each world. There's so much they have to pay attention to, since they have to figure out the protagonist of each world as well as the related plotline, all the while maintaining vigilance against all the other players who may be the lurking monster. The monsters don't understand emotion, but they have access to all memories of the person they take over, so it's very easy for them to mimic existing behavior. You need to have very strong observation and logical deduction skills in order to beat these worlds. As I kept reading, I constantly had the thought that if I were to ever get sucked into one of these worlds, I'd be the first one gone. Plus one of the worlds featured a closed time travel loop, so it was quite challenging to keep up and wrap my head around what was happening. I have to give the author kudos for being able to write such intricate worlds and smart characters, it couldn't have been easy.
Some spoiler-ish thoughts ahead as well as a short summary of all the rule worlds:
I absolutely loved this novel. Would highly recommend to anyone who likes reading books that make them think. Just make sure you can handle the horror elements, which can be quite scary and gory.