Bantu Prophets in South Africa by Bengt Sundkler
Originally published in 1948 and then updated in 1961 outlines the religious and social background of the Zulus and discusses the rise of the Independent Church Movement. It examines the organization and inner workings of the different Churches, their forms of worship, and the personalities of their leaders. It also analyses the blend of old and new which appears in Zulu interpretations of some aspects of Christian doctrine.