Jean-Paul Sartre and Simone de Beauvoir were two of the most brilliant, influential, and scandalous intellectuals of the 20th century. They are remembered as much for the lives they led as for their influence on the way we think. Their committed but notoriously open union created huge controversy in their lifetime. And even before their deaths they had become one of history's legendary couples, renowned for the passion, daring, humour and intellectual intensity of their relationship. This fascinating book presents a biography of Sartre and de Beauvoir's relationship and offers some highly original theories relating to the extent of de Beauvoir's contribution to their shared ideas. Edward and Kate Fullbrook contend that it was de Beauvoir's demand for sexual freedom that dictated the open terms of their relationship and that it was in fact de Beauvoir who was the more powerful thinker of the two. Through a thorough examination of Sartre and de Beauvoir's major works, the authors present a compelling story of their romantic and intellectual relationships.