Is that really fair?

Hey People

I have a question, and I'd love to hear some feedback. Let's say, a boy is in class and accidentally starts reading an outside reading book, when he's not supposed to. So, the teacher takes the book. Fair? Yes. But when the teacher takes the book, hands it to another student, and asks him to return it to the library. Is that fair? Also, what if it happens to be the week when all library books are supposed to be returned for the summer, so you can't check books out. So, basically the teacher has taken the book, and doesn't intend to give it back to you, ever. Is that fair, I'd love to hear some opinions on this