See below for English description. Au matin de l'incendie de l'hôtel qui a coûté la vie à Irina Spasky, Dan et Amy retrouvent dans un carnet de l'ex-espionne une mystérieuse phrase, extraite d'une chanson. Ils comprennent que leur prochaine destination est Pretoria, en Afrique du sud. Sur place, un vieil homme leur remet une carte postale retraçant l'histoire de Chaka Zoulou, un guerrier sans pitié, membre du clan Tomas... The most dangerous secret in Amy and Dan's past is unveiled in Book 7 of the #1 New York Times bestselling series. It's no longer a game. The body count is rising. Shaken by recent events, Amy and Dan flee to an exotic land and trace the footsteps of their most formidable ancestor yet: a military leader of mythic proportions. Yet just as the siblings begin to master the art of ancient warfare, they confront a dangerous enemy that can't be felled with a sword: the truth. With the stakes higher than ever, Amy and Dan uncover a devastating secret that changes everything. Original title: The 39 Clues #7: The Viper's Nest