In many ways, Emily Skidmore’s True Sex picks up where Jen Manion’s Female Husbands left off with a few minor differences. Skidmore is only looking at US history, while Manion covered both the UK and the US. Manion, in theory, focused on transing gender in the context of marriages or marriage-like relationships, while Skidmore doesn’t have that as a specific focus (although many of the people she covers did marry). In terms of methodological approach they look at much of the same types of data, especially the spread of trans stories in news publications.