also seconding this great comment over in !books@lemmy.ml.

seconding a focus on sexology; we don’t need another Institut für Sexualwissenschaft incident.

off the top of my head:

• The History of Sexuality (Michel Foucault 1976 – 84 + 2018)
• Transgender Warriors (Leslie Feinberg 1998)
• Gender Trouble (Judith Butler 1990)
• Undoing Gender (Judith Butler 2004)
• Caliban and the Witch (Silvia Federici 2004)
• Black on Both Sides (C. Riley Snorton 2017)
• The Stonewall Riots (Marc Stein 2019)

including all the works of Judith Butler and Silvia Federici.

more academically:

• Kinsey Reports; The Kinsey Institute: The First Seventy Years; and any other expansions on the work of the Kinsey Institute
• Lesbian, Gay, Bisexual, and Transgender Healthcare: A Clinical Guide to Preventive, Primary, and Specialist Care (Kristen Eckstrand, Jesse M. Ehrenfeld 2016)

you can probably farm the bibilographies on these.