Set in interwar Germany, The Intermediaries tells the forgotten story of the Institute for Sexual Science, the world's first center for homosexual and transgender rights. Headed by a gay Jewish man, Dr. Magnus Hirschfeld, the institute aided in the first gender-affirming surgeries and hormone treatments, acting as a rebellious base of operations in the face of rising prejudice, nationalism, and Nazi propaganda.An expert in medical history, Brandy Schillace tells the story of the Institute through the eyes of Dora Richter, an Institute patient whom we follow in her quest to transition and live as a woman. While the colorful but ultimately tragic arc of Weimar Berlin is well documented, The Intermediaries is the first book to assert the inseparable, interdependent relationship of sex science to both the queer rights movement and the permissive Weimar culture, tracking how political factions perverted that same science to suit their own ends.This riveting book brings together forgotten scientific and surgical discoveries (including previously untranslated archival material from Berlin) with the politics and social history that galvanized the first stirrings of the trans rights movement. Through its unforgettable characters and immersive, urgent storytelling, The Intermediaries charts the relationships between nascent sexual science, queer civil rights, and the fight against fascism. It tells riveting stories of LGBTQ pioneers--a surprising, long-suppressed history--and offers a cautionary tale in the face of today's oppressive anti-trans legislation.