Little Notes Which Like Each Other, by Richard Wurmbrand, is a 158 page book focused on Christ alone, written from the perspective of a man who endured much suffering.
Siberia Diary
Sermons in Solitary Confinement
Father in Prison
Samizdat: Chronik Eines Neuen Lebens in Der Sowjetunion
Reaching Toward the Heights
A Ransom for Wurmbrand