ELEN CALDECOTT - Marsh Road Mysteries: Crowns And Codebreakers

When Minnie's gran comes to stay, all the way from Nigeria, Minnie knows there will be trouble. And straightaway Gran notices she's picked up the wrong suitcase at the airport.
 
But when their house is burgled and the only thing taken is the suitcase, Minnie realises there'll be much more trouble than she bargained for.