Peter Tremayne: Shroud for the Archbishop (USA 1998)

From the Publisher:
"CONVINCING AND FASCINATING." -- Mystery Scene
In the autumn of A.D. 664, the Holy City of Rome is the capital of Christendom. From the quaint far edge of the world -- Ireland -- comes Sister Fidelma of Kildare, along with a delegation of Saxon converts with whom she disagrees. But now the sharp‑witted, outspoken young religieuse, trained in criminal investigation in a land where women aspire to the same roles as men, is being called upon to solve a murder.

The archbishop designate of Canterbury, a strategic ally of Rome, has been found garroted in his chambers in the Lateran Palace, and a priceless trove of religious objects has disappeared. While the Romans believe they know the killer's identity, Sister Fidelma is not so sure. Her inquiry will take her through some of Rome's most spectacular sights and darkest passageways, into a mystery that lies at the heart of a world echoing with religious conflict... a mystery in which the dying has only begun...

"Sister Fidelma is fast becoming a world ambassador of ancient Irish culture." -- Irish Post
"A brilliant and beguiling heroine... immensely appealing. Intriguing." -- Publishers Weekly

Peter Tremayne: Shroud for the Archbishop. In the Holy City Murder is the Ultimate Sin... A Sister Fidelma Mystery. Signet, ISBN: 0451193008 (July, 1998), 304 p., $5.99.