Lilac Girls by Martha Hall Kelly

Recommended by my daughter, I read this a few months ago.  The story of 3 different women during the World War II years.  Settings switched from New York to Paris, from Warsaw to Ravensbruck, from Ravensbruck to New England.  The 3 stories intertwine:  one a philanthropist (based on a true character), one a doctor and one an inmate.  More details about the treatment in the concentration camps, more incredulity on my part as to how the brain can excuse and overlook the behaviors that are imposed in desperate times like these -- and always the question that plagues me, "How would I respond?"