Sex Worker Union Organising is the first study of the emerging phenomenon of sex workers - prostitutes, exotic dancers such as lap dancers, porn models and actresses, and sex chatline workers - asserting that their economic activities are work and as such, they are entitled to workers' rights. The most developed instances of this struggle, in Australia, Britain, Canada, Germany The Netherlands, New Zealand and the US, have taken the form of unionisation. Sex Worker Union Organising analyses the basis and contexts for this struggle and assesses the opportunities and challenges facing these unionisation projects. It concludes that the most significant obstacles to the advance of these unionisation projects are the sparsity of sex worker union activists and the paucity of understanding of the sex worker discourse by sex workers and non-sex workers alike.