"Eva and her identical twin sister, Miriam, had a mostly happy childhood. Theirs was the only Jewish family in their small village in the Transylvanian mountains, but they didn't think much of it until anti-Semitism reared its ugly head in their school. Then, in 1944, ten-year-old Eva and her family were deported to Auschwitz. At its gates, Eva and Miriam were separated from their parents and other siblings, selected as subjects for Dr. Mengele's...