In God's Underground, by Richard Wurmbrand, is a 268 page book telling the stories of how Richard Wurmbrand ministered in prison to other prisoners.
The Soviet Saints
The Torchlighters: The Adoniram and Ann Judson Story
The Torchlighters: The Harriet Tubman Story
Where Christ Still Suffers
The Pilgrim's Progress: The Movie
The Wurmbrand Letters