Christian Mission by Dana Robert

This looks interesting. Some of the reviews:

"Attentive to theory, but not consumed by it, and sharply aware of the significance of gender in the dissemination of Christianity, Dana Robert distils a quarter of a century of her research into an erudite and accessible single volume account of the how Christianity became the largest religious tradition in the world. There is no better place for any reader to start becoming informed about this important subject." David Hempton, Harvard University

"This accessible overview of the entirety of Christian mission history is remarkable for the range and depth of the material Robert is able to pack into so short a book. It is a reliable and readable account, informed by the latest scholarship. It is especially valuable for its treatment of the relation between western and non-western missionary activity." David A. Hollinger, University of California, Berkeley

"Dana Robert's richly textured book shows us that the history of Christian missions is far from being merely a European colonial story, and will be immensely valuable to students and general readers who are concerned to uncover the historical roots of Christianity's current status as a truly global faith." Brian Stanley, University of Edinburgh.

"Christian Mission: How Christianity Became a World Religion (Blackwell Brief Histories of Religion)" (Dana L. Robert)