Der Gute Botschaft Verlag is a ministry with Bibles, Christian books, tracts, and flyers in 90 languages. They provide their literature free of charge "in limited quantities for distribution at bookstalls, refugee camps, markets, retirement homes, hospitals, prisons, etc." They ask for those interested in larger quantities to contact them.
Discipling Nations: The Power of Truth to Transform Cultures by Darrow L. Miller
Discipling in a Multicultural World by Ajith Fernando
The Lost Art of Disciple Making by LeRoy Eims