On a scenic lake 50 miles north of Berlin, Hitler opened a compound known as Ravensbrück — his only concentration camp for women. Opened in 1939, the camp initially held a few thousand political prisoners. By the end of World War II, nearly 130,000 women had passed through its gates. The prisoners there were subjected to slave labor and brutal forms of torture. Yet relatively little has been written about the camp. The SS burned all inmate records; the material that did exist lay locked behind the Iron Curtain for years. Now, a new book pieces together historical evidence to tell the stories of the women who lived and died at Ravensbrück.