Perhaps you could clarify your question for us by telling us which book you would like us to comment on.
Another example of a political injustice being done to a character in a book is that which is done to Helmholtz Watson and Bernard Marx in Brave New World. Both of these men are exiled from their homes because they have been thinking the "wrong" things. Watson can be said to have overcome his injustice by accepting it with equanimity, thus turning it into much less of a real punishment.
Again, if you have a specific book you are asking about, please let us know.