This book was only brought into being with the support, guidance, and contributions of many friends and colleagues. I wish to thank, first of all, the book's authors, all of whom put together their contributions with great effort, care, and thoughtfulness, cooperatively and patiently revising their chapters.This volume was born of conference sessions at the 2015 meeting of the American Association of Geographers and the 2015 Global Conference on Economic Geography. These sessions, and the initial ideas for this book, were put together in collaboration with my colleagues Nicolas Friederici, Heather Ford, Chris Foster, and Isis Hjorth. I am very grateful for the energy and creative guidance they each provided.The set of concerns that guide this book also find a supportive home among two overlapping groups of scholars at the Oxford Internet Institute: the "Geonet" and "Digital Inequality" research clusters. I wish to thank