In the thirteenth book in Stuart Gibbs's New York Times bestselling Spy School series, superspy middle schooler Ben Ripley goes off the grid to eliminate a cybersecurity threat.After a devious computer hacker pulls off the CIA's worst-case scenario, shutting down power networks all over the world, Ben and his fellow spies-in-training are forced to make a harrowing emergency landing of their plane in Indonesia. While chaos begins to erupt around the planet, Ben deduces that his team is closer to the mysterious hacker's base than anyone else. But with all computers and phones down, there's no way to communicate with anyone at the CIA. On their latest mission to save the world, Ben and his friends face a conniving villain, assassins, pirates, sharks, and very big lizards in the most remote--and deadly--location of any spy school yet!