The magus of Hay

Merrily Watkins, diocesan exorcist for nearby Hereford, knows little about Hay until a body is found in the dark pool below a waterfall on the outskirts of the town and the police ask her to assist. The dead man's peculiar interests will open a passage to the hidden heart of Hay and a secret history of magic and ritual murder. And Merrily is alone and vulnerable as never before ...