The best (free) stuff on movements
Off the top of my head, here's the seven best internet resources on movements I can think of. They are in alphabetical order and they are free. 1. Roland Allen, The Spontaneous Expansion of the Church: And the Causes Which Hinder It
2. Allan Anderson, Towards a Pentecostal Missiology for the Majority World
3. David Garrison, Church Planting Movements ebook
4. Philip Jenkins, A New Christendom
5. Donald McGavran, The Bridges of God
6. George Patterson, The Spontaneous Multiplication of Churches
7.Ralph Winter, The Two Structures of God's Redemptive Mission
Let me know if you have some other suggestions. . .