Taken at the Flood, Agatha Christie. HarperCollins (ISBN: 9780062073846), 2011 (originally published in 1948).

Summary: A young widow and her brother inherit a family fortune, stirring family resentments until a mysterious figure threatens blackmail and is found dead.

Gordon Cloade was the benefactor of the Cloade family. During the war, he meets a young widow, Rosaleen Underhay on a ship, and marries her. Two days after they arrive in England, all but Rosaleen and her brother David, who has joined the household, are killed in a bombing raid. Cloade had not had time to change his will to provide for both wife and family. This meant that Rosaleen, for the duration of her life inherited the income from the capital of Cloade’s life, depriving the family of needed support.

But all may not be as it seems with Rosaleen. Her first marriage had been an unhappy one. Her husband separated and then was reported dead. But a conversation where a Major Porter was overheard by Poirot, while sheltering in a club from a bombing raid, suggests that Underhay never died, but was abroad under the name of Enoch Arden, a reference to a Lord Tennyson poem about one thought dead who was not.

Christie introduces us to the various Cloades, in various states of insolvency. Jeremy, the lawyer, has been pilfering funds, and a reckoning approaches. Lionel is a physician, and has become a morphine addict, to the detriment of his finances. Rowley has been able to eke by as a farmer but had hoped for more, particularly as he anticipates marrying the village girl, Lynn Marchmont, who has returned to live with her mother after Lynn’s service as a WREN during the war.

Needless to say, many wish Rosaleen dead, or at least her claim on the Cloade fortune disproven. Then a mysterious figure shows up in town, identifying himself to David, Rosaleen’s brother, as Enoch Arden, and threatening blackmail. When Arden is found dead, Rowley, acting in the family’s interests asks Poirot to confirm the identity of the man named Arden. He calls on Porter, who testifies at the inquest that he knew Underhay and that the dead man was Underhay, despite Rosaleen’s denials. David, as prime suspect is arrested.

There’s a tangled web that Poirot has to unravel before all becomes clear. Two more die along the way. Poirot will say one is accidental, one is a suicide, and one is murder. But which is which and how are they all connected is for Poirot to discover, as he talks to people and learns things, while those around him underestimate his abilities.

I thought this a cleverly written mystery that also offered an instructive tale on the follies of depending on the wealth of a benefactor–from family or otherwise. Along the way, there is a diverting subplot as Lynn, finding Rowley somewhat dull after her war adventures, is drawn by the allure of the roguish David. I’m not sure I like Christie’s use of partner violence in this plot. As a mystery, I think this one of her better efforts, written at the height of her powers in 1948.