N or M? (Agatha Christie)

Tommy & Tuppence are hired to track down wartime spies at a seaside resort...

It is World War II, and while the RAF struggles to keep the Luftwaffe at bay, Britain faces an even more sinister threat from 'the enemy within' - Nazis posing as ordinary citizens.

With pressure mounting, the Intelligence service appoints two unlikely spies, Tommy and Tuppence Beresford. Their mission: to seek out a man and a woman from among the colourful guests at Sans Souci, a seaside hotel. But this assignment is no stroll along the promenade. After all, N and M have just murdered Britain's finest agent...

Agatha Christie is known throughout the world as the Queen of Crime. Her books have sold over a billion copies in English with another billion in over 70 foreign languages. She is the most widely published author of all time and in any language, outsold only by the Bible and Shakespeare. She is the author of 80 crime novels and short story collections, 20 plays, and six novels written under the name of Mary Westmacott.