The 39 Clues (VII The Viper's Nest) (Chinese Edition)

This book tells the story: Under the guidance of Elena, Amy and Dan rush to South Africa. Sciacca Zulu, the leader of an African nation Zulu in history, is the key of this clue, but Amy and Dan have to break into a castle of the Thomas branch to get the clue. In searching for the clue, they unexpectedly discover that their parents have been wanted by police for murder in South Africa before their death.