Crowns and Codebreakers (Marsh Road Mysteries, #2)

Minnie's Gran picks up the wrong suitcase at the airport. Then Minnie's house is burgled and the only thing taken is the suitcase. The suitcase was full of boy's clothes. Who was the boy? What has happened to him? Minnie knows there is a mystery to be solved here and reassembles her gang to solve it.