Tommy and Tuppence Beresford mysteries

Set in 1919, young couple Tommy Beresford and Tuppence Cowley form a partnership, hiring themselves out as "young adventurers". Their first case, however, is more of an adventure than they expect - working to find secret documents that, if they were known to the general public, would fuel a communist revolution in Britain. They know that Jane Finn had the documents when she disappeared five years ago. What they don't know is that a killer is targeting...

Tommy and Tuppence Beresford, two unlikely spies, help to defend their country by trying to rout out two highly placed Fifth Columnists. When Tommy is asked by the British Intelligence Service to go and stay at the Sans Souci guest house he is astonished to see Tuppence there. The mission: to identify which of the other guests is N and which is M. - Publisher.