Who knows the book Rose Blanche

"Rose Blanche" ( Ian McEwan) was the name of a group of young German citizens who, at their peril, protested against the war. Like them, Rose observes all the changes going on her which others choose to ignore. She watches as the streets of her small German town fill with soldiers. One day she sees a little boy escaping from the back of a truck, only to be captured by the mayor and shoved back into it. Rose follows the truck to a desolate place out of town, where she discovers many other children, staring hungrily from behind an electric barbed wire fence. She starts bringing the children food, instinctively sensing the need for secrecy, even with her mother.  

What is the following ?