The Rape of Nanking: The Forgotten Holocaust of World War II by Iris Chang

In December 1937, the Japanese army invaded the ancient city of Nanking, systematically raping, torturing, and murdering more than 300,000 Chinese civilians.

This book tells the story from three perspectives: of the Japanese soldiers who performed it, of the Chinese civilians who endured it, and of a group of Europeans and Americans who refused to abandon the city and were able to create a safety zone that saved many.