While on assignment for Glamour’s “Women of the Year” portfolio, photographer Norman Jean Roy met one of its brave subjects, Somaly Mam, a former sex slave from Cambodia, who works to free people trapped in the sex industry and reintegrate them into society. In January 2008, Roy embarked on a challenging and emotional photographic journey through Cambodia to document the sex trade, hoping to shed light on this dark and often ignored subject. This excerpt from Roy’s Traffik, his first photographic book, spotlights sex-trade survivors who have been helped by Mam and the organization she co-founded, AFESIP Cambodia, to return abused women, girls and boys to normal lives. It also includes portraits of those still in danger. A portion from the sale of Traffik will go to the Somaly Mam Foundation. View the Vanity Fair slideshow here.