In fact, you don't have to read books to change your personality in prison. Other ways can be considered. I work in a prison. I have seen criminals read books, but I have never seen criminals who commit robbery read serious books. They are all novels, but I think if your brother believes in a religion, maybe it can be direct.

If you have to read books, you can consider reading some biographies of successful people, which is enlightening. People in prison are a little depressed.

"Rough work and meticulous work" can temper a person's character. Try to persuade him to reform well, just listen to the captain. Everyone works there.

It would be nice if you could really learn a skill from it, but it's very difficult. It's basically a form, and the key is whether I can understand it myself.