Legal analysis: books can be sent to prison. Family members can bring books to prisoners by mail or on-site interviews, but all books must be reviewed by the police. Generally speaking, as long as there are no reactionary books or books in pure foreign languages, you can bring them. Each prison has its own library, and each prison area also has its own reading room. Prisoners can borrow books at the appointed time every day. The prison also holds regular book fairs, which prisoners can buy themselves.
Legal basis: Article 49 of People's Republic of China (PRC) Prison Law. When a prisoner accepts property, he shall be approved and inspected by the prison.