What books are suitable for people in prison to read?

I think books suitable for people in prison are all positive and should be reformed, and there must be a spirit, that is, optimism and persistence in what they will do in the future.

If you give me three days of light, they can see helen keller's book. From this book, they can realize that Helen has been trying to be herself and helped many people who need her help, although her eyes can't see and her ears can't hear.

Books like Love Life are good for them to be good people after they get out of prison. They are positive things and do not hinder their psychological harm. As long as they turn over a new leaf, they are good people. If a person does not know how to correct, he is not worthy to be a man.