Eric Kroll’s cult 1977 book is an unflinching study of the marginalised mid-seventies American sex worker. Focusing on women who worked at roadside sex shops, massage parlours or live peep shows, Kroll’s poignant portraits sit alongside matter-of-fact interviews conducted with each subject, often printed in coloured paper. For the project, Kroll travelled from Iowa to California and to Texas, photographing 50 women in total and interviewing over 100.