Saint Bridgid's Bones, a Celtic Adventure by Philip Freeman

This historical fiction with a mild mystery is set during the time of transition just after St. Patrick brought Christianity to Ireland, when Christian and pagan ways were very much side by side and lords and kings tried to gain favor with both sides.  The story follows Sister Dierdre, a young nun of Saint Brigid's monastery, who is tasked with finding who has stolen the relics of their patron, Saint Bridged.  The relics are needed to draw pilgrims to the monastery with their donations, or the monastery will not survive.  Freeman populates his story with several colorful characters; who are not shy about discussing their sexual urges.  Sister Dierdre is no recluse, and is not shy about using subterfuge in her mission to find the relics.  Excellent feel for this period in Ireland.  224 pages.