The Librarian Who Opened the Door

In 1943, Irena Sendler worked as a nurse in the Warsaw Public Health Department. The Nazis had sealed 400,000 Jewish families behind the ghetto walls, and typhus gave Irena a reason to walk through the gates — health inspectors were permitted entry. She could have simply done her job, filed her reports, and gone home each evening to her apartment on Ludwiki Street.…