Recognized as one of the Ten Outstanding Books of 2017 for Mission Studies by the International Bulletin of Mission Research Andrew F. Walls's first collection of essays, The Missionary Movement in Christian History, was named by Christianity Today in their list of the top 100 most influential books of the twentieth century. In this third collection, Walls carries forward his decades-long project, upending staid interpretations of Christian history by examining the role of mission and cross-cultural transmission of the Gospel in the formation of World Christianity. In essays marked by profound learning and his characteristic wit, Walls covers themes ranging from the transmission of Christian faith, to Africa in Christian thought and history, along with reflections on a broad range of mission figures, and a personal reflection on "missiology as a vocation." "Once again Andrew Walls dazzles the reader with the reach of his intellect and his ability to extract from eye-witness accounts the story that illustrates perfectly the ironies of the transmission of Christian faith. An absolute masterpiece." -- William R Burrows, Research Professor of Missiology, New York Theological Seminary "Andrew Walls has been at the forefront of the study of World Christianity for more than a generation. Crossing Cultural Frontiers demonstrates why. The essays collected here from several decades of writing offer fresh and challenging insights on a variety of fronts, powerfully making the case that 'World Christianity is not a development of the last century; it is the natural Christian condition.'" -- Dale T. Irvin, President and Professor of World Christianity New York Theological Seminary "The merit of the collection of essays is the attention Walls gives to the religious dimension of Christianity's missionary career, with pointers to the kind of new theological inquiry set to commence in the world beyond the West. The book is a welcome addition to the two previous collected essays that introduced American readers to the work of Andrew Walls." -- Lamin Sanneh, Yale University Andrew F. Walls is a former missionary to Sierra Leone and Honorary Professor in the University of Edinburgh; Professor of the History of Mission, Liverpool Hope University; and Emeritus Professor, Akrofi-Christaller Institute, Akropong, Ghana. His books include The Missionary Movement in Christian History, The Cross-Cultural Process in Christian History, and (with Cathy Ross), Mission in the 21st Century (all Orbis).