What does the phrase "ubiquitous media" actually mean? Individual definitions are just as varied and ubiquitous as the media to which they refer. As a result, there is to date no large-scale theoretical framework through which we can understand the term. The goal of this volume is to provide a diverse set of critical, theoretical, and international approaches useful to those looking for a more diverse and nuanced understanding of what ubiquitous media means analytically. In contrast to other existing texts on mobile media, these contributions on mobile media are contextualised within a larger discussion on the nature and history of ubiquitous media. Other sections of this edited volume are dedicated to historical perspectives on ubiquitous media, ubiquitous media and visual culture, the role of ubiquitous media in surveillance, the political economy of ubiquitous media, and the way a ubiquitous media environment affects communities, spaces, and places throughout the world.