Ministries with Prison Discipleship Books and Booklets

ECS Ministries
http://ecsministries.org/
https://www.emmausecourses.com
ECS Ministries has discipleship books they sell on their online store. There are English discipleship books and there are books printed in other languages.

International Prison Ministry (IPM)
http://chaplainray.com/testimonial-books/
http://chaplainray.com/
IPM provides many biblical resources for prisoners, for the purposes of evangelism and edification. The books featured on their website are testimonies of former prisoners who had their lives transformed through relationship with Jesus Christ. From sinners being saved by grace through faith in Jesus Christ, to growing into godly, fruitful people as His disciples now ministering to others, these are a selection of their stories.