I see what this is about- You are also on Feminist activism tribe. Me too! I would urge you to narrow your focus on particular sex workers. Studies conducted on sex workers in a crack house may be drastically different from what you are attempting to research. For example, sex workers in crack houses are typically motivated by access to crack and/OR some type of security offered by men that will actually take care of them in their own homes in exchange for service strictly for them. There is a unique realtionship built in these siotuations where one or two women will move into a man's apartment. He will take care of them in exchange for sexual services and they may share crack. However, it is clear that these are "working" relationships with added dimensions of dependence and friendship. However, in analyzing these situations it would be careless to ignore the race, gender, and socio-economic sources and impacts on this particular dimension of sex work. It is difficult to write a book on "sex work" without narrowing the parameters in terms of defining sex work and looking at particular location/cities/urban vs. suburban, social class of the workers, environment (is it organized) etc. Hope that helps. Try to be as scientific as possible so that sweeping generalizations about sex workers don't contaminate what you are trying to get across.