If you put the word prison in the search engine, you might get around
730 results. If you put the word prisoner in the search engine, you might get around 320 results. I do not recommend all the books and dvds at christianbook.com They sell some good stuff and some that is not doctrinally sound. There are other types of materials besides books and dvds.
Here is one book and one video download.
The Principles of Prison Ministry
Serving in Prison Ministry [Video Download]
If you have any questions or need help finding a particular video, tract, book or any other Christian resource in any language of the world, please contact firstname.lastname@example.org