IN THE COUNTESS’S office, I eyed the makeshift mattress where she slept each night in order to keep watch over the Library—she was seventy years old, yet ready to confront Nazi soldiers. A few books rested near her pillow. I leaned forward to see the titles, but Bitsi tugged at my sleeve, urging me toward the others who’d gathered at the desk. Meetings that had once teemed with staff had dwindled to the secretary, the caretaker, Bitsi, Boris, Margaret, me, and Clara de Chambrun.