 Her book, "Beauvoir in love" (2012), based on a survey in the United States by the University of Columbus, Ohio, shed light on Simone Beauvoir's misunderstood passion for the American writer Nelson Algren.She orchestrated courses on Beauvoir and illuminated some of Beauvoir's psychological features hitherto ignored, often retouching the biased and even negative portrait that Beauvoir made of her American lover after their separation.Frain also stressed the role of Algren in the genesis of "The Second Sex".