The buzzwords "Information Society" and "Age of Access" suggest that information is now universally accessible without any form of hindrance. Indeed, the German constitution calls for all citizens to have open access to information. Yet in reality, there are multifarious hurdles to information access - whether physical, economic, intellectual, linguistic, political, or technical. Thus, while new methods and practices for making information accessible arise on a daily basis, we are nevertheless confronted by limitations to information access in various domains. This book series assembles academics and professionals in various fields in order to illuminate the various dimensions of information's inaccessibility. While the series discusses principles and techniques for transcending the hurdles to information access, it also addresses necessary boundaries to accessibility.