Radio Frequency Identification (RFID) is a key part of the infrastructure underlying the burgeoning Internet of Things. RFID tags, which can be attached to objects and then scanned with readers to give these objects a digital signature, can be as small as a grain of rice. This book aims to bring RFID into the foreground, giving readers a sense of what the technology is, how it is being and could be used, and how concerned we should be about its implications, especially those regarding privacy. This book is not aimed at people well-acquainted with RFID. A good portion is devoted to explaining what RFID is, tracing its development, and giving a general overview of its uses. While the book does not presume any special knowledge of RFID or technical background on the part of its readers, if you are unfamiliar with the style of writing favored by continental theorists like Foucault, some of the author's prose can be jarring. For example, rather than write about The key function of RFID tags is to allow individual objects (which can be shipping pallets, toll transponders in cars, articles of clothing in retail stores, livestock, etc.) to be identified in a way that can be read and then processed digitally. To function, RFID tags must be part of a system that includes readers to scan the tags and software that adds the scanned information to a database or manipulates it in some way. The bulk of the book is devoted to filling in the details about these systems and the various things they can be used to do.