Andrew M. Greeley, a priest ordained in the diocese of Chicago nearly four decades ago, has been a noted scholar for many years (a professor of social science at the University of Chicago and the author of scores of books in sociology) and has been a constant best-selling fiction writer since the publication of his first novel, "The Cardinal Sins." He has also extended his fiction to include science fiction and detective stories. His mystery solver, Father Blacky, is reminiscent of G.K. Chesterton's Father Brown.