Susan J. Brison is Eunice and Julian Cohen Professor for the Study of Ethics and Human Values and Professor of Philosophy at Dartmouth College.Katharine Gelber is Professor of Politics and Public Policy at the University of Queensland and a Fellow of the Academy of Social Sciences Australia.

• Introduction - Susan J. Brison and Katharine Gelber Chapter 1: Digital Dualism and the 'Speech as Thought' Paradox - Katharine Gelber, Susan BrisonChapter 2: Search Engines and Free Speech Coverage - Robert Simpson, Heather WhitneyChapter 3: Cyber Harassment and Free Speech: Drawing the Line Online - James WeinsteinChapter 4: Recipes, Plans, Instructions and the Free Speech Implications of Words that are tools - Frederick SchauerChapter 5: Free Speech Categories in the Digital Age - Ashutosh BhagwatChapter 6: Privacy, Speech and Digital Imagination - Robert PostChapter 7: Why Combatting Online Abuse is Good for Free Expression - Danielle Keats CitronChapter 8: 'Not Where Bodies Live': The Abstraction of Internet Expression - Mary Anne FranksChapter 9: Demographics, Design and Free Speech: How Demographics have Produced Social Media Optimized for Abuse and the Silencing of Marginalized Voices - Soraya ChemalyChapter 10: Unmasking Hate on Twitter: Disrupting Anonymity by Tracking Trolls - Diana Ascher, Safiya NobleChapter 11: Online Dating Sites as Public Accommodations: Facilitating Racial Discrimination - Sonu BediChapter 12: The Meaning of Silence in Cyberspace: The Authority Problem and Online Hate Speech - Alexander BrownChapter 13: Regulating Online Speech: Keeping Humans, and Human Rights, at the Core - Dinah PoKempner

This is a valuable book. Not least because of the quality of research contained in each chapter, both philosophical and applied. But also, and perhaps more significantly, for what it achieves by putting these scholars in conversation both with the extant literature and with the fast-moving world-changing forces of the digital age.