The Red Door (Inspector Ian Rutledge Series #12) »

Charles Todd is the author of nine Ian Rutledge mysteries—A Pale Horse, A False Mirror, A Long Shadow, A Cold Treachery, A Fearsome Doubt, Watchers of Time, Legacy of the Dead, Search the Dark, Wings of Fire, and A Test of Wills—and one stand-alone novel. They are a mother-and-son writing team and live in Delaware and North Carolina, respectively.

Lancashire, England, June, 1920. Who was the woman who lived and died behind the red door? What did she see before she died? And who was the man who never came home from the Great War, for the simple reason that he had never really gone? How is the woman's death linked to his disappearance? And why is Scotland Yard blind to the connection, even when Inspector Ian Rutledge points it out?

The New York Times - Marilyn Stasio

Twelve books into a series of mysteries set in England in the aftermath of World War I, the mother and son who team-write under the name of Charles Todd keep finding new ways to gauge the emotional effects of war on the living and the half-dead.