A cutting-edge selection of essays to explore the growth of the incidence and prevalence of non-binary gender. With contributions from psychoanalytic experts and those with lived experience: Robin J. Ely, Oren Gozlan, Robin Haas, Daniel H. Jacobs, Malkah T. Notman, Francesca Spence, Lewis Harwood "Harry" Spence, Rita K. Teusch, and Shari Thurer.