-According to other books, it does not show an alternate history that has taken place as a result, it tells the process of its formation (at least that's how I understood it). In such an event, the book gives the feeling of what will happen in the future, which is a great feeling. Also, the character dialogues and conversations between them were quite nice.
-And as said, it seems to have managed to cover almost all genres under one theme without breaking the rules.