Yes, she’s been dead for 34 years. She started writing the book, titled The Inseparables and based on her best friend (who died at 21), in 1954, the year she won the Prix Goncourt for The Mandarins and five years after she published The Second Sex. Jean-Paul Sartre, her partner, was unimpressed with the novel, and de Beauvoir put it aside. Scholars wondered what had happened to it; turns out she had kept the manuscript and typescript in her archives. – The New York Times