Nanoscience has garnered billions of dollars of funding and has been hailed as ushering in the Next Industrial Revolution. But, for such a richly anticipated field, it has made its way into products all around us — from odor-eating socks to cosmetics and medications — without much fanfare, while popular media offer competing visions of nanotechnology as cornucopia or Armageddon. Somewhere in between are social scientists, ethicists, and others reflecting on our understanding of the broad implications of nanotechnology, gauging its promises and risks, assessing the impacts of policy decisions, and communicating the meaning of nanoscience research. The newly released, two-volume Encyclopedia of Nanoscience and Society is the result. Edited by David Guston, director of the Center for Nanotechnology in Society at Arizona State University, the book is accessible and jargonfree and contains approximately 425 entries by contributors from the disciplines of sociology and psychology, economics and business, science and engineering, computing and information technology, philosophy, ethics, public policy, and more.