Wilbert Shenk presents five important papers on how Christian historical and mission studies need to be changed in the light of the emergence of World Christianity and the demise of the West as its spiritual and political center. Shenk introduces the entire question in a brilliant essay that portrays the demographic, cultural, and theological shifts in tectonics. His introduction is followed by five chapters and concludes with a reflection by four historians on the contents of this pathbreaking book.