Dan Brown, author of "The Da Vinci Code" is writing a book about exorcism with the apparent help of a former Roman Catholic archbishop from Zambia. Emmanuel Milingo, who was recalled to the Vatican after marrying a South Korean woman, reportedly met with representatives of Brown about working with him on a new novel, The Times of Zambia reported Wednesday. Brown and Milingo plan to meet in late September in England to discuss the project. Besides working with Brown on the new novel, Milingo is also said to have reached an agreement to collaborate with Sony Pictures on the production of a film based on Brown's earlier novel entitled "Angels and Demons." The Vatican has been worried about Milingo's since he disappeared from his residence outside Rome in June of this year. A month later he turned up in Washington, publicly calling for the Catholic Church to permit married clergy. Milingo's apparent interest in Brown, whose novel cast aspersions on Catholicism, raises the specter of yet more trouble for the Vatican, as the former archbishop has already said publicly that the Roman Catholic Church has devil worshipers in it. Five years ago Milingo stunned the religious world by announcing his embrace of the Unification Church, led by the self-proclaimed Korean messiah, Sun Myung Moon, and his decision to marry a woman selected for him by Moon. Shortly after that, however, Pope John Paul II persuaded Milingo to recant and move to Rome where he lived quietly, without a pastoral assignment. Since his recent Washington appearance, Milingo has returned to his South Korean bride, and continued to push for a married clergy.