Search the Dark is the third book in Charles Todd mystery series about a Scotland Yard detective suffering the results of having fought in World War 1. I began with the first book and am reading through the series. The detective is fascinating, and the author (author team, actually) is good at realizing fully-formed characters.
from the back of the book:
The introspective hero of Wings of Fire and A Test of Wills (Edgar award nominee) returns in a provocative new mystery. Inspector Ian Rutledge, haunted by memories of World War 1 and the harrowing presence of Hamish, a dead soldier, is "a superb characterization of a man whose wounds have made him a stranger in his own land" (The New York Times Book Review).Kirkus Reviews concludes, "Best for those who like their mystery melodramas written the old-fashioned way." Publishers Weekly calls it a "fine period mystery".
A dead woman and two missing children bring Inspector Rutledge to the lovely Dorset town of Singleton Magna, where the truth lies buried with the dead. A tormented veteran whose family died in an enemy bombing is the chief suspect. Dubious, Rutledge presses on to find the real killer. And when another body is found in the rich Dorset earth, his quest reaches into the secret lives of villagers and Londoners whose privileged positions and private passions give them every reason to thwart him. Someone is protecting a murderer. And two children are out there, somewhere, in the dark...
I've also read these from the series: