Ah, but you have. Check out that zeitgeist post. or try Might try: "Dying and Rising Gods" from volume 4 of The Encyclopedia of Religion edited by Mircea Eliade (1987) The Gospel and the Greeks: Did the New Testament Borrow from Pagan Thought? by Ronald Nash (P & R, 1992, 2003) The Riddle of Resurrection: "Dying and Rising Gods" in the Ancient Near East by T. N. D. Mettinger (Almqvist & Wiksell, 2001) Drudgery Divine: On the Comparison of Early Christianities and the Religions of Late Antiquity by Jonathan Z. Smith (Univ of Chicago Press, 1990) On the subject of virgin births, the definitive source is The Virgin Birth of Christ by J gresham Machen ( New York: Harper, 1930) still unrefuted.