THE CHILD OF THE HOLY GRAIL is the last installment in Rosalind Miles`s Guinevere trilogy. In this volume, Arthur is aging, and his kingdom is threatened by something new: Christianity, which seeks to end goddess worship--a state of affairs that further alienates the tempestuous Morgan le Fay, whose son (and Arthur`s bastard) Mordred wants to take over the kingdom. Failing to heed the warnings of the wise Guinevere, Arthur--and the kingdom of Camelot--head for destruction.