The second edition of this definitive text gives a comprehensive overview of all aspects of the subject, bringing it up-to-date with analysis of the changes in the information environment, now largely digital, and their implication for the discipline and professions. Its approach is rooted in the philosophical, theoretical, and conceptual foundations of the subject and in particular in Floridi's ideas of the fourth revolution, hyperhistory, and onlife. The theory-practice relationship is strongly emphasised throughout, and the extensive literature coverage makes this a valuable sourcebook....