Meg-John Barker (born 23 June 1974) is a writer, writing mentor, creative consultant, speaker, and independent scholar. They have written a number of anti self-help books on the topics of relationships, sex, and gender, as well as the graphic non-fiction books, Queer: A Graphic History and Gender: A Graphic Guide, and the book The Psychology of Sex. They are the writer of the relationships book and blog Rewriting the Rules, and they have a podcast with sex educator Justin Hancock. Barker's pronouns are singular they/them.