Meg-John Barker is the author of a number of popular books on sex, gender, and relationships, including “Queer: A Graphic History” (with Julia Scheele), “Gender: A Graphic Guide” (with Jules Scheele), “How to Understand Your Gender” (with Alex Iantaffi), “Enjoy Sex (How, When, and IF You Want To)” (with Justin Hancock), “Rewriting the Rules“, and “The Psychology of Sex”. They also work as a one-to-one writing mentor, as a creative consultant on various projects, and speak and train on gender, sexual, and relationship diversity. They are half of the Meg-John and Justin podcast (megjohnandjustin.com), and blog and publish zines and comics on rewriting-the-rules.com. They regularly speak on their areas of expertise in the media, including Radio 4, Cosmo, and being featured in the Independent on Sunday Rainbow List.

They were an academic psychologist and UKCP accredited therapist for many years before focusing on writing full time. They are an internationally recognised expert on gender, sexual, and relationship diversity (GSRD) and therapy, with numerous academic books and papers on the topics of bisexuality, open non-monogamy, sadomasochism, non-binary gender, and Buddhist mindfulness. They co-founded the journal Psychology & Sexuality and the activist-research organisation BiUK, through which they published The Bisexuality Report. They have advised many organisations, therapeutic bodies, and governmental departments on matters relating to gender, sexual, and relationship diversity (GSRD) including writing the BACP document on the topic.