A Google user
This book was extremely helpful to me as a missionary. I saw firsthand the principles of which Mr. Allen wrote. We saw how missions money controlled by the sending country actually tends to restrict spiritual growth and produce a type of slavery. I highly recommend it, even though it may be quite dry and seem outdated here and there. I also recommend going on to another of his books, The Spontaneous Expansion of the Church: and the Causes Which Hinder It.