Pember's career as a writer appears to have been very financially successful because in successive UK census records his occupation is described as a man of "independent means". The books that he wrote all reflect the distinctive doctrinal themes of the Brethren outlined above. His books "The Antichrist, Babylon and the Coming Kingdom", "The Great Prophecies of the centuries concerning Israel and the Gentiles", and "Mystery Babylon the Great" are examples of Brethren interpretations of biblical prophecies in light of current events, and about the rejection of divisions in the Protestant churches. His book "The Lord's Command" is a classic example of Brethren arguments that uphold the need for only adults (believer's baptism) to be baptised and the rejection of the practice of infant baptism.