In the fourteenth book in Stuart Gibbs's New York Times bestselling Spy School series, superspy middle schooler Ben Ripley journeys to China to save the Hale family! When the seasoned adult spies of the Hale family mysteriously disappear on a mission to China, Ben Ripley and his fellow spies-in-training head east to discover what happened to them--and find themselves up against a villainous plot that will take them from the skyscrapers of Shanghai to the ancient ruins of the Great Wall to the remote regions of the Gobi desert.