Paul B. Preciado is the author of Counter-Sexual Manifesto (Columbia University Press), Testo Junkie: Sex, Drugs and Biopolitics (The Feminist Press) and Pornotopia (Zone Books), for which he was awarded the Sade Prize in France. He was Head of Research of the Museum of Contemporary Art of Barcelona (MACBA) and Director of the Independent Studies Program (PEI) from 2011 to 2014. From 2014 to 2017 he was the Curator of Public Programmes of documenta 14. He is currently the Resident Philosopher at the Centre Pompidou and lives in Paris, France.

Preciado looks back on a period of gender transition, contextualised in relation to the political and sexual discourses of recent years and situated in Karl Heinrich Ulrich's nineteenth century theorising of uranism and a third sex. Virginie Despentes provides the foreword.