Tommy and Tuppence Beresford mysteries

Detective duo Tommy and Tuppence Beresford apply their wits, charms, and adventurous spirits to a menacing mystery that spells certain poisonous death for a missing lady at the hands of dangerous unknown foe.-Amazon.com.

Set during the dark days of World War II, Agatha Christie's N or M? puts two most unlikely espionage agents, Tommy and Tuppence Beresford, on the trail of a pair of Nazi spies who have murdered Britain's top agent. World War II is raging, and while the RAF struggles to keep the Luftwaffe at bay, Britain faces a sinister threat from "the enemy within"-Nazis posing as ordinary citizens. With pressure mounting, the intelligence service appoints two improbable...

Tommy and Tuppence Beresford have just become the proud owners of an old house in an English village. Along with the property, they have inherited some worthless bric-a-brac, including a collection of antique books. While rustling through a copy of The Black Arrow, Tuppence comes upon a series of apparently random underlinings. However, when she writes down the letters, they spell out a very disturbing message: "Mary Jordan did not die naturally."...