A CASTLE IN WARTIME : ONE FAMILY, THEIR MISSING SONS, AND THE FIGHT TO DEFEAT THE NAZIS
by Catherine Bailey 

As World War II encroached upon all of Europe, a woman by the name of Fey von Hassell thought that she could resist the Nazis right where she lived. Fey was the daughter of Ulrich von Hassell, Hitler's Ambassador to Italy. She resided with her husband Detalmo Pirzio-Biroli, an Italian aristocrat, in a castle in the northern part of Italy. Because it was tucked away in the environs, the chaos of war left them untouched. But as soon as Fascism reared its ugly head, Ulrich and Detalmo decided to resist the Nazis. Detalmo joined an underground, anti-Fascist resistance group in Rome. Ulrich despised Hitler and assembled other like-minded souls to plot his assassination.
Fey ended up being stuck in the castle as SS soldiers moved in. As both Ulrich and Detalmo became ever more defiant and mutinous, the Gestapo soon showed up at Fey's doorstep. She was arrested and her two young toddlers (ages two and three) were taken away by the SS.
A Castle in Wartime is an incredible story. Apparently author Catherine Bailey is quite well-known (she has written two other books) because she has this incredible ability to weave family histories with immense historical events. She certainly has done that here. Bailey was able to use first-hand family accounts, documents from concentration camps, and even files from the SS.
It's very compelling, absorbing, and will keep you riveted. 
Highly recommended.