Tortured for Christ by Richard Wurbrand.  It was offered absolutely FREE thru; this site.  A friend is interested.  Now it's "nowhere to be found."  These men & women under Communism & the horrific tortures they endured.  Romania long suffered under Russia.  Plus the disgusting acts they were forced to perform are "beyond belief."  They are the TRUE Christians.  It's nearly surreal.  Sadly it's NOT fiction.  This is fact.  God bless them, all.

Mere Christianity by CS Lewis.. Lewis was an atheist who converted to Christianity. Very thought provoking, if that is what your looking for.