her first book, "trabajar en la industria del sexo, y otros tópicos migratorios", was published in spain in 2004 (gakoa, ). in 2007, she published her second book, "sex at the margins: migration, labour markets and the rescue industry" (zed books, ). in this book, she argued that contemporary anti-trafficking "crusades" have the effect of restricting international freedom of movement, and she compared today's anti-trafficking feminists with the "bourgeois women" of the 19th century who felt the need to save poor prostitutes, seeing women as weak, easily victimized, and in need of guidance. agustín does not deny human trafficking or forced prostitution takes place, but, rather, argues that the campaigners against prostitution and undocumented migration over-estimate figures.