About the book (from Goodreads):
When the quiet Little Vestry of St. Matthew’s Church becomes the blood-soaked scene of a double murder, Scotland Yard Commander Adam Dalgliesh faces an intriguing conundrum: How did an upper-crust Minister come to lie, slit throat to slit throat, next to a neighborhood derelict of the lowest order? Challenged with the investigation of a crime that appears to have endless motives, Dalgliesh explores the sinister web spun around a half-burnt diary and a violet-eyed widow who is pregnant and full of malice–all the while hoping to fill the gap of logic that joined these two disparate men in bright red death.
About P. D. James (from Wikipedia):
P. D. James, was an English crime writer. She rose to fame for her series of detective novels starring police commander and poet Adam Dalgliesh.
Her first novel, Cover Her Face, featuring the investigator and poet Adam Dalgliesh of New Scotland Yard, named after a teacher at Cambridge High School, was published in 1962. Many of James’s mystery novels take place against the backdrop of UK bureaucracies, such as the criminal justice system and the National Health Service, in which she worked for decades starting in the 1940s. Two years after the publication of Cover Her Face, James’s husband died, and she took a position as a civil servant within the criminal section of the Home Office. She worked in government service until her retirement in 1979.
In 1991, James was created a life peer as Baroness James of Holland Park. She sat in the House of Lords as a Conservative. She was an Anglican and a lay patron of the Prayer Book Society. Her 2001 work, Death in Holy Orders, displays her familiarity with the inner workings of church hierarchy. Her later novels were often set in a community closed in some way, such as a publishing house or barristers’ chambers, a theological college, an island or a private clinic. Talking About Detective Fiction was published in 2009. Over her writing career, James also wrote many essays and short stories for periodicals and anthologies, which have yet to be collected. She revealed in 2011 that The Private Patient was the final Dalgliesh novel.