Book excerpt: This book has brought together some of the foremost scholars of South Asian and Global History, who were colleagues and associates of Professor John F. Richards to discuss themes that marked his work as a historian in an academic career of almost forty years. It encapsulates discussions under the rubric of 'frontiers' in multiple contexts. Frontier has often been conceived as a space of transformation marking new forms of economic organization, commodity trade, land settlement and state authority. The essays here underline the range of interests and approaches that marked Professor Richards' illustrious career - frontiers and state building; frontiers and environmental change; cultural frontiers; frontiers, trade and drugs; and frontiers and world history. The volume discusses issues from medieval to early modern South Asian history. It also reflects a concern for large-scale global processes and for the detailed specificities of each historical case as evident in Professor Richards' work.