Carefully recall the scene and process of the disappearance of the book at that time and think about who took it. If you can't remember, you have to go to school to try. If the school says so, they will do it, which is just a punishment for themselves. Who told you not to read the book, leave it alone, and lend it to you from the library, which is a kind of trust. Don't blame the person who took the book. He also taught you a lesson so as not to make you believe in yourself next time.