French philosopher, novelist, and essayist, the lifelong companion of [Jean-Paul Sartre][1] and vice versa. Beauvoir's two volume treatise [Le deuxième sexe][2] (1949, The Second Sex) is among the most widely read feminist works. ([Source][3].)
[1]: openlibrary.org/a/OL896456A/Jean-Paul_Sartre [2]: openlibrary.org/works/OL767937W/Le_deuxie%CC%80me_sexe [3]: www.kirjasto.sci.fi/beauvoir.htm
