Kenneth R. Ross is Professor of Theology and Dean of Postgraduate Studies at Zomba Theological University, and Extraordinary Professor at the University of Pretoria. Earlier he served as General Secretary of the Church of Scotland Board of World Mission and, since 2012, has been an adviser to the World Council of Churches. He has published extensively on many different aspects of World Christianity, including the highly successful EUP book, The Atlas of Global Christianity 1910-2010, co-edited with Todd M. Johnson. Since 2013, Ross and Johnson have collaborated as Series Editors of the EUP Edinburgh Companions to Global Christianity. Daniel Jeyaraj is an Indian Christian theologian with expertise in historical theology, the studies on Indo-German missions, Indic religions and Tamil ethics. He is the Professor of World Christianity and Director of the Andrew F. Walls Center for the Study of African and Asian Christianity at Liverpool Hope University in England. He has earlier served as Judson-DeFreitas Professor of World Christianity at Andover Newton Theological School, John A. Mackay Professor of World Christianity, Princeton Theological Seminary and Aaron Professor for the History of Christianity, Gurukul Lutheran Theological College and Research Institute. Todd M. Johnson is Paul E. and Eva B. Toms Distinguished Professor of Mission and Global Christianity at Gordon-Conwell Theological Seminary, South Hamilton, MA. Johnson is Associate Faculty at Boston University's Institute for Culture, Religion and World Affairs leading a research project on international religious demography. He has published encyclopedias, atlases, databases, monographs, and scholarly articles on counting religionists around the world.