Alex Iantaffi is an internationally recognized independent scholar, speaker, and writer on issues of gender, disability, sexuality, and mental health. They are also a licensed marriage and family therapist, sex therapist, somatic experiencing practitioner and supervisor. They have previously published Gender Trauma, How to Understand Your Gender, and Life Isn't Binary.

Meg-John Barker is an internationally renowned writer, therapist, and activist-academic specializing in sex, gender, and relationships. They have published over twenty books including Queer: A Graphic History, How to Understand Your Gender, and Life Isn't Binary.