Doomsday, zombies, individuals, groups... I have also read some doomsday novels. How to say, I always feel that they are not reasonable and logical some people say that science fiction doesn't need logic. It's too serious to look good. Indeed, including many Hollywood blockbusters, there is no logic but I just can't stand it. I always feel that under the premise of common sense and logic, I should be able to build a wonderful plot is it possible? This book is the answer. We'll see.