Vintges, Karen. Philosophy as Passion: The Thinking of Simone de Beauvoir, translated by Anne Lavelle. Bloomington: Indiana University Press, 1996.

From the publisher:

Philosophy as Passion refutes the commonly held view of Simone de Beauvoir as no more than an acolyte of Jean-Paul Sartre. Karen Vintges delineates Beauvoir’s independent, original ethics and philosophy, drawing on the moral-philosophical treatises of the 1940s and ’50s, The Second Sex, The Mandarins, and her autobiographical works. Vintges shows that Beauvoir’s unique notions added an ethical dimension to existentialist philosophy.

Online:
Amazon