After the two financial managers for the valuable Chiversley convent are mysteriously murdered, the area bishop asks Mark Treasure to look into the case, and Treasure proceeds to unravel the mystery.
David Williams (June 8, 1926 – September 26, 2003) was a Welsh advertising executive who became a crime writer after suffering a stroke.
Williams was born in Bridgend in Wales. He started in advertising as a medical copywriter, rising through the ranks to head one of the largest advertising agencies in the country. He suffered a severe stroke in 1977 and realised that he would not be able to return to the stresses of life in the advertising industry. He had written crime fiction in his spare time, with Unholy Writ being written before his stroke in 1976. He turned from advertising to writing "whodunnits": he wrote 23 novels in all, most featuring Mark Treasure, Oxford graduate and vice-chairman of a merchant bank, and his successful actress wife Molly. A second series of books featured Chief Inspector Merlin Parry of the South Wales Constabulary, together with Sergeant Gomer Lloyd. His books were twice shortlisted for the Crime Writers' Association Gold Dagger award and he was elected as a member of the Detection Club in 1988.