Max Wolf Valerio crafts a raw, gripping, and poetic account of life before, during, and after injecting testosterone. Valerio's detailed observations about a lesbian transitioning from female to a heterosexual male highlights the physical and emotional differences between women and men, and alternately challenges and confirms readers' assumptions about gender.

The Testosterone Files addresses the most fundamental issues of transitioning, from buying men's underwear to choosing a male name, as well as the profound subjects of male privilege, physical power, and existing as a male who was once distrustful and critical of men's intentions. Valerio's honest and forthcoming opinions on gender, identity, and self-perception comprise the core of this intensely personal and absorbing narrative which grapples with the tough and complex issues that emerge in a world whose assumptions about gender binaries are being increasingly challenged as more people openly self-define across the gender spectrum.