Saul Levmore & Martha C. Nussbaum, editors, The Offensive Internet: Speech, Privacy, and Reputation (2012)
This is a great collection of essays about the clash of free speech and privacy online. I have a book chapter in this volume along with Martha Nussbaum, Cass Sunstein, Brian Leiter, Danielle Citron, Frank Pasquale, Geoffrey Stone, and many others.