Btihaj Ajana is Professor of Ethics and Digital Culture at the Department of Digital Humanities at King's College London, UK. She is a former Marie Curie Fellow at Aarhus Institute of Advanced Studies, Denmark.Joaquim Braga is Researcher and Professor at the Department of Philosophy at the University of Coimbra, Portugal. He is also a member of the university's Institute for Philosophical Studies.Simone Guidi is Researcher at the CNR-ILIESI, Italy. He was (2019-2020) Assistant Professor of Philosophy at the University of Coimbra, Portugal, and FCT Post-Doc Fellow (2017-2019) at the same university's Institute for Philosophical Studies.

• INTRODUCTION; Btihaj Ajana, Joaquim Braga, and Simone Guidi PART I: Body Quantification and Subjectivity: Philosophical Perspectives Chapter 1. Body, Media and Quantification; Joaquim Braga Chapter 2. I Quantify, Therefore I Am: Quantified Self Between Hermeneutics of Self and Transparency; Lorenzo De Stefano Chapter 3. Quantified Care: Self-Tracking as a Technology of the Subject; Alessandro De Cesaris PART II: Body Quantification: Historical and Empirical Perspectives Chapter 4. Historical Context of Tracking Public Health and Quantifying Bodies: From the UK Welfare State to Digital Self-Care; Rachael Kent Chapter 5. Metrics of the Self: A Users’ Perspective; Btihaj Ajana Chapter 6. Whose Bodies? Approaching the Quantified Menstruating Body Through a Feminist Ethnography; Amanda Karlsson PART III: Body Quantification and Mental Health Chapter 7. #Wellness or #Hellness: The Politics of Anxiety and the Riddle of Affect in Contemporary Psy-care; Ana Carolina Minozzo Chapter 8. Me Apps: Mental Health and the Smartphone; Zeena Feldman PART IV: Body Quantification and Smart Machines Chapter 9. The ‘Smart’ AI Trainer & her Quantified Body at Work; Phoebe V. Moore Chapter 10. Towards a Quanto-Qualitative Biological Engineering: The Case of the Neuroprosthetic Hand; Laura Corti