Reviewed by: Information: A Historical Companion ed. by Ann Blair et al. Marc Kosciejew (bio) Information: A Historical Companion Edited by Ann Blair, Paul Duguid, Anja Silvia Goeing, and Anthony Grafton. Princeton: Princeton University Press, 2021. Pp. 904. In Information: A Historical Companion, historians Ann Blair, Paul Duguid, Anja Silvia Goeing, and Anthony Grafton, as editors, situate the phenomenon of information at the center of historical focus. Illuminating the variegated ways in which information has shaped and been shaped by societies from antiquity to the present, they show how new kinds of information challenges—sociocultural, managerial, organizational, political, and economic—at different times and places often necessitated new approaches to, technologies for, and understandings of, information. Compiling interdisciplinary contributions from distinguished historians and theorists, the book outlines a continuous, information-focused historical landscape and narrative of this complex phenomenon. The scale and scope of coverage is ambitious. The sociocultural settings are global, and historical eras are extensive. The book covers the ancient Roman Empire; the medieval Islamic world; early modern East Asia and Europe; the Renaissance, Enlightenment, and Industrial Revolution; the British Empire and other nineteenth-century colonial powers; the two World Wars; twentieth-century globalization; and today's late-capitalist knowledge society. The technologies examined, meanwhile, are heterogeneous in kind and myriad in format, ranging from early writing tools and scrolls, codices, and books to more recent innovations, from computers and digital devices to algorithms and artificial intelligence. Moreover, the associated or required technological infrastructures enabling information creation, transmission, and storage presented are also broad, including postal services, telegraph cables, radios, televisions, computers, internet connections, and wireless communications. By tracing information's trajectory, this book is noteworthy for encapsulating the complex history of an already complicated phenomenon within the confines of one, albeit hefty, tome of over 900 pages. To this end, it simultaneously functions as an in-depth scholarly volume and a utilitarian reference tool. Arranged into two main parts of long chapters and short entries, the book achieves both continuity and diversity in approach and analysis. Although the long chapters and short entries can stand alone, together, they paint a rich portrait of information's longue durée, technological inventions, instantiations, processes, and wide reach from assorted angles. Comprised of thirteen long chapters, the book's first part builds a chronological narrative of information's history, from the premodern and early modern periods to the twentieth century and today. Each chapter supplies detailed overviews of, and interesting insights about, information within its particular sociocultural and historical purview, then concluding [End Page 1276] with substantial further-reading lists of resources germane to the topic. Every chapter makes references to other chapters, establishing connections between topics and facilitating dialog between contributors. Additionally, the editors have marked specific words with an asterisk on first mention within the chapters, facilitating convenient cross-referencing with a detailed glossary, placed near the book's end, which defines terms and clarifies their usage within the book. Containing 101 short entries, the book's second part concentrates on specific issues of special importance to the history of information. Alphabetically arranged, the entries extend the conversations from the preceding chapters by directing attention to or narrowing focus on specific aspects, topics, or themes. They also showcase further reading lists and draw connections between each other and the chapters by featuring "see also" cross references. The editors supply a user-oriented navigation aid at the beginning of the book in the form of two lists, the first an alphabetical list and the second a thematic list organized by concepts, formats, genres, objects, people, practices, processes, systems, and technologies. Through these internal cross-references, connections, and dialogs within and between the chapters and entries, the editors construct a seemingly unwieldly history. As a topic, technology traverses most chapters and entries, and even serves as the main theme or focus of multiple entries. This book should therefore appeal to historians of technology and specifically attract scholars and students interested in the intersections between technology, information, and history. Its interdisciplinary approach might also introduce some historians to ideas and literature beyond their disciplinary concentrations and, in turn, help them forge new or previously unknown or unexpected relationships between their work...