In Charles Todd's Wings of Fire, Inspector Ian Rutledge is quickly sent to investigate the sudden deaths of three members of the same eminent Cornwall family, but the World War I veteran soon realizes that nothing about this case is routine.
Including the identity of one of the dead, a reclusive spinster unmasked as O. A. Manning, whose war poetry helped Rutledge retain his grasp on sanity in the trenches of France. Guided by

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The weathered remains found on a Scottish mountainside may be those of Eleanor Gray, but the imperious Lady Maude Gray, Eleanor's mother, will have to be handled delicately. This is not the only ground that Inspector Ian Rutledge of Scotland Yard must tread carefully, for the case will soon lead him to Scotland, where many of Rutledge's ghosts rest uneasily. But it is an unexpected encounter that will hold the most peril.
For in Scotland Rutledge...

“[Charles] Todd’s mysteries are among the most intelligent and affecting being written these days.”—The Washington Post Book World 
In 1912 Ian Rutledge helped gather the evidence that sent Ben Shaw to the gallows. Now, seven years later, Ben Shaw’s widow brings Rutledge evidence she’s convinced proves her husband’s innocence. Ben Shaw’s past is a tangle of unsettling secrets that...

In the ruins of Yorkshire's Fountains Abbey lies the body of a man wrapped in a cloak, the face covered by a gas mask. Next to him is a book on alchemy, which belongs to the schoolmaster, a conscientious objector in the Great War. Who is this man, and is the investigation into his death being manipulated by a thirst for revenge?

Meanwhile, the British War Office is searching for a missing man of their own, someone whose war work was so secret

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It's 1920. Three men are dead, all garroted, all war veterans. When a piece of evidence, kept from the public, suggests a much stronger link between the victims and the unknown, it's up to World War I battered survivor, Scotland Yard Detective Ian Rutledge to find the killer