Set during the second world War in German occupied Rome.  An Irish priest, Hugh O'Flaherty, dedicates himself to helping those escaping from the Nazis. His home is Vatican City, a neutral, independent country within Rome where the occupiers hold no sway. He gathers a team to set up an Escape Line.  But the German's net begins closing in and the need for a terrifyingly audacious mission grows critical. By Christmas, it's too late to turn back.

Based on a true story, My Father's House is a powerful thriller from a master of historical fiction. It is an unforgettable novel of love, sacrifice and what it means to be human in the most extreme circumstances. 
 
I also loved 'Star of the Sea'.