Only Begotten Daughter — James Morrow

Call it a miracle. Call it an accident at the sperm bank. But Murray Katz, the celibate keeper of an abandoned lighthouse near Atlantic City, has been blessed with a daughter conceived from the union of his own seed and a holy ovum. Like her half-brother Jesus, Julie Katz can walk on water, heal the blind, and raise the dead.

But being the Messiah isn't easy. Poor Julie, bewildered about her role in the divine scheme of things, is tempted by the Devil and challenged by firebombing neo-Christian zealots -- and that's just the beginning of her fantastic odyssey through Hell, a seceded New Jersey, and her own confused soul.