Susannah Cornwall is Professor of Constructive Theologies in the Department of Theology and Religion at the University of Exeter and Director of the Exeter Centre for Ethics and Practical Theology (EXCEPT). She is the author of Un/familiar Theology: Reconceiving Sex, Reproduction and Generativity (2017); Theology and Sexuality (2013); Controversies in Queer Theology (2011); and Sex and Uncertainty in the Body of Christ: Intersex Conditions and Christian Theology (2010).

• Part I. Setting the Scene: 1. Introduction: transformative creatures; 2. Detransition, impermanence, and the innocence of changing one's mind; 3. Existing Christian theological responses to transition: being transformed/being, transformed; Part II. Telling Truths: 4. Autonomy and trans people: authenticity, responsibility, recognition; 5. Gender transition, truth-telling and artifice; 6. Self-protection or 'gender fraud'? Ethics and the burden of disclosure; Part III. Limits, Technology, and Health: 7. Technological interventions and licit limits: on the alteration and augmentation of bodies; 8. Trans people, health, and diversities of order; 9. Fertility, generativity, and gender theology in the operative mood; 10. Transforming humanity: gender, race, and animality; 11. In Christ, everything has changed: Christology and creation; 12. Transformative creatures reprised: theological anthropology and eschatology.