In her book, “My Body,” Emily Ratajkowski reflects on her fraught relationship with the huge number of photographs of her body that have come to define her life and career. Some essays recount the author’s hustle as a young model who often found herself in troubling situations with powerful men; another is written as a long, venomous reply to an email from a photographer who has bragged of discovering her. Throughout, Ratajkowski is hoping to set the record straight: She is neither victim nor stooge, neither a cynical collaborator in the male agenda, as her critics have argued, nor some pop-feminist empoweree, as she herself once supposed.