The ingredients of this mystery plot run all the way from the fancies of some old ladies in a home for the elderly, to dark hints at child murder, the machinations of a clever criminal gang, and the secret life of a supposedly peaceful English village.

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 are restless for adventure, so when they are asked to take over Blunt's International Detective Agency, they leap at the chance. Their first case is a success-the triumphant recovery of a pink pearl. Other cases soon follow-a stabbing on Sunningdale golf course; cryptic messages in the personal columns of newspapers; and even a box of poisoned chocolates. But can they live up to their slogan of "Any case solved in 24 hours"?...