Joining in with the Spirit is an accessible introduction to mission studies -- the history, theology and issues of mission, which is up-to-date and supported by contemporary scholarship. It also offers a theological framework for mission, which applies both globally and locally, to help the reader discern the movement of the Spirit of Christ among the many other spirits of this world. This text illustrates the impact of the 1910 Edinburgh World Missionary Conference and shows how the churches in Britain are a part of a much wider movement of the Spirit of Christ that is World Christianity.