Showing Service of All the Dead by Colin Dexter

The sweet countenance of Reason greeted Morse serenely when he woke, and told him that it would be no bad idea to have a quiet look at the problem itself before galloping off to a solution. Chief Inspector Morse was alone among the congregation in suspecting continued unrest in the quiet parish of St Frideswide’s. Most people could still remember the churchwarden’s murder. A few could still recall the murderer’s suicide. Now even the police had closed the case. Until a chance meeting among the tombstones reveals startling new evidence of a conspiracy to deceive . . .