Martin published several books in quick succession the following years: "The Final Conclave" (1978), "King of Kings: a Novel of the Life of David" (1980) and "Vatican: A Novel" (1986) were "factionals". "The Decline and Fall of the Roman Church" (1981), "The New Castle: Reaching for the Ultimate" (1982), "Rich Church, Poor Church: The Catholic Church and its Money" (1984) and "There is Still Love: Five Parables of God's Love That Will Change Your Life" (1984) were non-fiction works. His bestselling 1987 non-fiction book, "The Jesuits: The Society of Jesus and the Betrayal of the Roman Catholic Church", was highly critical of the Order, accusing the Jesuits of systematically undermining church teachings.